diff --git a/app/build.gradle b/app/build.gradle
index f4ba9142..5adecd0b 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -2,7 +2,7 @@ plugins {
     id('com.android.application')
     id 'kotlin-android'
     id 'kotlin-kapt'
-//    id 'com.google.devtools.ksp'
+    id 'com.google.devtools.ksp'
     id('com.github.triplet.play') version '3.8.3' apply false
 }
 
@@ -159,8 +159,8 @@ android {
         // Version code schema (not used):
         // "1.2.3-beta4"    -> 1020304
         // "1.2.3"          -> 1020395
-        versionCode 3020143
-        versionName "5.2.0"
+        versionCode 3020144
+        versionName "5.2.1"
 
         def commit = ""
         try {
@@ -213,7 +213,6 @@ android {
         }
     }
 
-
     androidResources {
         additionalParameters "--no-version-vectors"
     }
@@ -233,7 +232,8 @@ dependencies {
         }
     }
 
-    kapt "androidx.annotation:annotation:1.7.1"
+//    doesn't work with ksp??
+    kapt "androidx.annotation:annotation:1.8.0"
 
     implementation "androidx.appcompat:appcompat:1.6.1"
     implementation 'androidx.coordinatorlayout:coordinatorlayout:1.2.0'
diff --git a/app/src/main/assets/licenses.xml b/app/src/main/assets/licenses.xml
index 1244915a..eba77668 100644
--- a/app/src/main/assets/licenses.xml
+++ b/app/src/main/assets/licenses.xml
@@ -61,11 +61,11 @@
         license="Apache 2.0"
         licenseText="LICENSE_APACHE-2.0.txt" />
     <library
-        name="Glide"
-        author="bumptech"
-        website="https://github.com/bumptech/glide"
-        license="Simplified BSD"
-        licenseText="LICENSE_GLIDE.txt" />
+        name="Coil"
+        author="Colin White et.al"
+        website="https://github.com/coil-kt/coil"
+        license="Apache 2.0"
+        licenseText="LICENSE_APACHE-2.0.txt" />
     <library
         name="Iconify"
         author="Joan Zapata"
diff --git a/app/src/main/java/ac/mdiq/podcini/ui/fragment/FeedItemlistFragment.kt b/app/src/main/java/ac/mdiq/podcini/ui/fragment/FeedItemlistFragment.kt
index 10ae2286..bad97254 100644
--- a/app/src/main/java/ac/mdiq/podcini/ui/fragment/FeedItemlistFragment.kt
+++ b/app/src/main/java/ac/mdiq/podcini/ui/fragment/FeedItemlistFragment.kt
@@ -47,7 +47,6 @@ import com.google.android.material.snackbar.Snackbar
 import com.joanzapata.iconify.Iconify
 import com.leinardi.android.speeddial.SpeedDialActionItem
 import com.leinardi.android.speeddial.SpeedDialView
-import io.reactivex.disposables.Disposable
 import kotlinx.coroutines.*
 import org.apache.commons.lang3.StringUtils
 import org.greenrobot.eventbus.EventBus
@@ -128,10 +127,8 @@ class FeedItemlistFragment : Fragment(), AdapterView.OnItemClickListener, Toolba
         val iconTintManager: ToolbarIconTintManager = object : ToolbarIconTintManager(
             requireContext(), binding.toolbar, binding.collapsingToolbar) {
             override fun doTint(themedContext: Context) {
-                binding.toolbar.menu.findItem(R.id.refresh_item)
-                    .setIcon(AppCompatResources.getDrawable(themedContext, R.drawable.ic_refresh))
-                binding.toolbar.menu.findItem(R.id.action_search)
-                    .setIcon(AppCompatResources.getDrawable(themedContext, R.drawable.ic_search))
+                binding.toolbar.menu.findItem(R.id.refresh_item).setIcon(AppCompatResources.getDrawable(themedContext, R.drawable.ic_refresh))
+                binding.toolbar.menu.findItem(R.id.action_search).setIcon(AppCompatResources.getDrawable(themedContext, R.drawable.ic_search))
             }
         }
         iconTintManager.updateTint()
@@ -357,13 +354,13 @@ class FeedItemlistFragment : Fragment(), AdapterView.OnItemClickListener, Toolba
     @UnstableApi @Subscribe(threadMode = ThreadMode.MAIN)
     fun favoritesChanged(event: FavoritesEvent?) {
         Logd(TAG, "favoritesChanged called")
-        updateUi()
+        loadItems()
     }
 
     @UnstableApi @Subscribe(threadMode = ThreadMode.MAIN)
     fun onQueueChanged(event: QueueEvent?) {
         Logd(TAG, "onQueueChanged called")
-        updateUi()
+        loadItems()
     }
 
     override fun onStartSelectMode() {
@@ -386,27 +383,23 @@ class FeedItemlistFragment : Fragment(), AdapterView.OnItemClickListener, Toolba
         swipeActions.attachTo(binding.recyclerView)
     }
 
-    @UnstableApi private fun updateUi() {
-        loadItems()
-    }
-
     @UnstableApi @Subscribe(threadMode = ThreadMode.MAIN)
     fun onPlayerStatusChanged(event: PlayerStatusEvent?) {
         Logd(TAG, "onPlayerStatusChanged called")
-        updateUi()
+        loadItems()
     }
 
     @UnstableApi @Subscribe(threadMode = ThreadMode.MAIN)
     fun onUnreadItemsChanged(event: UnreadItemsUpdateEvent?) {
         Logd(TAG, "onUnreadItemsChanged called")
-        updateUi()
+        loadItems()
     }
 
     @UnstableApi @Subscribe(threadMode = ThreadMode.MAIN)
     fun onFeedListChanged(event: FeedListUpdateEvent) {
         if (feed != null && event.contains(feed!!)) {
             Logd(TAG, "onFeedListChanged called")
-            updateUi()
+            loadItems()
         }
     }
 
@@ -461,7 +454,6 @@ class FeedItemlistFragment : Fragment(), AdapterView.OnItemClickListener, Toolba
     @UnstableApi private fun setupHeaderView() {
         if (feed == null || headerCreated) return
 
-        // https://github.com/bumptech/glide/issues/529
         binding.imgvBackground.colorFilter = LightingColorFilter(-0x99999a, 0x000000)
         binding.header.imgvCover.setOnClickListener { showFeedInfo() }
         binding.header.butShowSettings.setOnClickListener {
@@ -572,7 +564,7 @@ class FeedItemlistFragment : Fragment(), AdapterView.OnItemClickListener, Toolba
                     val feed_ = loadData()
                     if (feed_ != null) {
                         var hasNonMediaItems = false
-                        for (item in feed_!!.items) {
+                        for (item in feed_.items) {
                             if (item.media == null) {
                                 hasNonMediaItems = true
                                 break
diff --git a/app/src/main/java/ac/mdiq/podcini/ui/fragment/QueueFragment.kt b/app/src/main/java/ac/mdiq/podcini/ui/fragment/QueueFragment.kt
index 49790184..0711d08f 100644
--- a/app/src/main/java/ac/mdiq/podcini/ui/fragment/QueueFragment.kt
+++ b/app/src/main/java/ac/mdiq/podcini/ui/fragment/QueueFragment.kt
@@ -134,8 +134,7 @@ class QueueFragment : Fragment(), Toolbar.OnMenuItemClickListener, SelectableAda
         recyclerAdapter = object : QueueRecyclerAdapter(activity as MainActivity, swipeActions) {
             override fun onCreateContextMenu(menu: ContextMenu, v: View, menuInfo: ContextMenu.ContextMenuInfo?) {
                 super.onCreateContextMenu(menu, v, menuInfo)
-                MenuItemUtils.setOnClickListeners(menu
-                ) { item: MenuItem -> this@QueueFragment.onContextItemSelected(item) }
+                MenuItemUtils.setOnClickListeners(menu) { item: MenuItem -> this@QueueFragment.onContextItemSelected(item) }
             }
         }
         recyclerAdapter?.setOnSelectModeListener(this)
@@ -163,7 +162,6 @@ class QueueFragment : Fragment(), Toolbar.OnMenuItemClickListener, SelectableAda
             override fun onMainActionSelected(): Boolean {
                 return false
             }
-
             override fun onToggleChanged(open: Boolean) {
                 if (open && recyclerAdapter!!.selectedCount == 0) {
                     (activity as MainActivity).showSnackbarAbovePlayer(R.string.no_items_selected, Snackbar.LENGTH_SHORT)
@@ -193,11 +191,10 @@ class QueueFragment : Fragment(), Toolbar.OnMenuItemClickListener, SelectableAda
         recyclerView.saveScrollPosition(TAG)
     }
 
-    override fun onStop() {
-        super.onStop()
-        scope.cancel()
-//        disposable?.dispose()
-    }
+//    override fun onStop() {
+//        super.onStop()
+////        disposable?.dispose()
+//    }
 
     @Subscribe(threadMode = ThreadMode.MAIN)
     fun onEventMainThread(event: QueueEvent) {
@@ -340,6 +337,7 @@ class QueueFragment : Fragment(), Toolbar.OnMenuItemClickListener, SelectableAda
         recyclerAdapter?.endSelectMode()
         recyclerAdapter = null
         EventBus.getDefault().unregister(this)
+        scope.cancel()
 
         toolbar.setOnMenuItemClickListener(null)
         toolbar.setOnLongClickListener(null)
@@ -518,7 +516,6 @@ class QueueFragment : Fragment(), Toolbar.OnMenuItemClickListener, SelectableAda
                 Log.e(TAG, Log.getStackTraceString(e))
             }
         }
-
     }
 
     override fun onStartSelectMode() {
diff --git a/app/src/main/java/ac/mdiq/podcini/ui/view/viewholder/EpisodeItemViewHolder.kt b/app/src/main/java/ac/mdiq/podcini/ui/view/viewholder/EpisodeItemViewHolder.kt
index 136aa8b3..47027206 100644
--- a/app/src/main/java/ac/mdiq/podcini/ui/view/viewholder/EpisodeItemViewHolder.kt
+++ b/app/src/main/java/ac/mdiq/podcini/ui/view/viewholder/EpisodeItemViewHolder.kt
@@ -107,8 +107,8 @@ class EpisodeItemViewHolder(private val activity: MainActivity, parent: ViewGrou
         container.alpha = if (item.isPlayed()) 0.75f else 1.0f
 
         val newButton = ItemActionButton.forItem(item)
-//        Log.d(TAG, "bind ${actionButton?.TAG} ${newButton.TAG} ${item.title}")
-        // not using a new button to ensure valid progress values
+        Logd(TAG, "bind ${actionButton?.TAG} ${newButton.TAG} ${item.title}")
+        // not using a new button to ensure valid progress values, for TTS audio generation
         if (!(actionButton?.TAG == TTSActionButton::class.simpleName && newButton.TAG == TTSActionButton::class.simpleName)) {
             actionButton = newButton
             actionButton?.configure(secondaryActionButton, secondaryActionIcon, activity)
diff --git a/build.gradle b/build.gradle
index ebfc59ae..4e9d722a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -13,9 +13,9 @@ buildscript {
     }
 }
 
-//plugins {
-//    id 'com.google.devtools.ksp' version '1.9.22-1.0.17' apply false
-//}
+plugins {
+    id 'com.google.devtools.ksp' version '1.9.24-1.0.20' apply false
+}
 
 allprojects {
     repositories {
diff --git a/changelog.md b/changelog.md
index 10e49142..1a582f57 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,7 @@
+## 5.2.1
+
+* fixed issue of play/pause button not correctly updated in Queue
+
 ## 5.2.0
 
 * suppressed log.d messages in release app (unbelievable incomplete suppression last time)
diff --git a/fastlane/metadata/android/en-US/changelogs/3020144.txt b/fastlane/metadata/android/en-US/changelogs/3020144.txt
new file mode 100644
index 00000000..ace6bf7d
--- /dev/null
+++ b/fastlane/metadata/android/en-US/changelogs/3020144.txt
@@ -0,0 +1,4 @@
+ 
+Version 5.2.1 brings several changes:
+
+* fixed issue of play/pause button not correctly updated in Queue
diff --git a/fastlane/metadata/android/en-US/full_description.txt b/fastlane/metadata/android/en-US/full_description.txt
index dbb47660..b267ff5f 100755
--- a/fastlane/metadata/android/en-US/full_description.txt
+++ b/fastlane/metadata/android/en-US/full_description.txt
@@ -1,5 +1,5 @@
 
-Podcini is an open source podcast instrument, attuned to Puccini, adorned with pasticcini and aromatized with porcini.
+Podcini, an open source podcast instrument, attuned to Puccini, adorned with pasticcini and aromatized with porcini, invites your harmonious heartbeats.
 
 It allows you to subscribe to any RSS feed (with or without media), gives you instant access to millions of free and paid podcasts or plain RSS feeds, from independent podcasters to large publishing houses such as the BBC, NPR and CNN. Add, import and export their feeds hassle-free using the Apple Podcasts database, OPML files or simple RSS URLs.