diff --git a/vector/src/main/java/im/vector/app/features/roommemberprofile/RoomMemberProfileFragment.kt b/vector/src/main/java/im/vector/app/features/roommemberprofile/RoomMemberProfileFragment.kt
index 760bbe9353..5fee420b21 100644
--- a/vector/src/main/java/im/vector/app/features/roommemberprofile/RoomMemberProfileFragment.kt
+++ b/vector/src/main/java/im/vector/app/features/roommemberprofile/RoomMemberProfileFragment.kt
@@ -47,6 +47,8 @@ import im.vector.app.databinding.DialogBaseEditTextBinding
 import im.vector.app.databinding.DialogShareQrCodeBinding
 import im.vector.app.databinding.FragmentMatrixProfileBinding
 import im.vector.app.databinding.ViewStubRoomMemberProfileHeaderBinding
+import im.vector.app.features.MainActivity
+import im.vector.app.features.MainActivityArgs
 import im.vector.app.features.analytics.plan.MobileScreen
 import im.vector.app.features.crypto.verification.VerificationBottomSheet
 import im.vector.app.features.displayname.getBestName
@@ -131,13 +133,20 @@ class RoomMemberProfileFragment @Inject constructor(
                 is RoomMemberProfileViewEvents.OnKickActionSuccess         -> Unit
                 is RoomMemberProfileViewEvents.OnSetPowerLevelSuccess      -> Unit
                 is RoomMemberProfileViewEvents.OnBanActionSuccess          -> Unit
-                is RoomMemberProfileViewEvents.OnIgnoreActionSuccess       -> Unit
+                is RoomMemberProfileViewEvents.OnIgnoreActionSuccess       -> handleOnIgnoreActionSuccess(it)
                 is RoomMemberProfileViewEvents.OnInviteActionSuccess       -> Unit
             }
         }
         setupLongClicks()
     }
 
+    private fun handleOnIgnoreActionSuccess(action: RoomMemberProfileViewEvents.OnIgnoreActionSuccess) {
+        if (action.shouldPerformInitialSync) {
+            // A user has been un-ignored, perform a initial sync
+            MainActivity.restartApp(requireActivity(), MainActivityArgs(clearCache = true))
+        }
+    }
+
     private fun setupLongClicks() {
         headerViews.memberProfileNameView.copyOnLongClick()
         headerViews.memberProfileIdView.copyOnLongClick()
diff --git a/vector/src/main/java/im/vector/app/features/roommemberprofile/RoomMemberProfileViewEvents.kt b/vector/src/main/java/im/vector/app/features/roommemberprofile/RoomMemberProfileViewEvents.kt
index efe23eeff0..1857f5cdc4 100644
--- a/vector/src/main/java/im/vector/app/features/roommemberprofile/RoomMemberProfileViewEvents.kt
+++ b/vector/src/main/java/im/vector/app/features/roommemberprofile/RoomMemberProfileViewEvents.kt
@@ -25,7 +25,7 @@ sealed class RoomMemberProfileViewEvents : VectorViewEvents {
     data class Loading(val message: CharSequence? = null) : RoomMemberProfileViewEvents()
     data class Failure(val throwable: Throwable) : RoomMemberProfileViewEvents()
 
-    object OnIgnoreActionSuccess : RoomMemberProfileViewEvents()
+    data class OnIgnoreActionSuccess(val shouldPerformInitialSync: Boolean) : RoomMemberProfileViewEvents()
     object OnSetPowerLevelSuccess : RoomMemberProfileViewEvents()
     object OnInviteActionSuccess : RoomMemberProfileViewEvents()
     object OnKickActionSuccess : RoomMemberProfileViewEvents()
diff --git a/vector/src/main/java/im/vector/app/features/roommemberprofile/RoomMemberProfileViewModel.kt b/vector/src/main/java/im/vector/app/features/roommemberprofile/RoomMemberProfileViewModel.kt
index 4bcf9ef55d..addc2c71ef 100644
--- a/vector/src/main/java/im/vector/app/features/roommemberprofile/RoomMemberProfileViewModel.kt
+++ b/vector/src/main/java/im/vector/app/features/roommemberprofile/RoomMemberProfileViewModel.kt
@@ -390,7 +390,7 @@ class RoomMemberProfileViewModel @AssistedInject constructor(
                 } else {
                     session.ignoreUserIds(listOf(state.userId))
                 }
-                RoomMemberProfileViewEvents.OnIgnoreActionSuccess
+                RoomMemberProfileViewEvents.OnIgnoreActionSuccess(isIgnored)
             } catch (failure: Throwable) {
                 RoomMemberProfileViewEvents.Failure(failure)
             }
diff --git a/vector/src/main/res/values/strings.xml b/vector/src/main/res/values/strings.xml
index 551983637c..ffd4333071 100644
--- a/vector/src/main/res/values/strings.xml
+++ b/vector/src/main/res/values/strings.xml
@@ -634,7 +634,7 @@
     <string name="room_participants_action_ignore">Ignore</string>
 
     <string name="room_participants_action_unignore_title">Unignore user</string>
-    <string name="room_participants_action_unignore_prompt_msg">Unignoring this user will show all messages from them again.</string>
+    <string name="room_participants_action_unignore_prompt_msg">Unignoring this user will show all messages from them again.\n\nNote that this action will restart the app and it may take some time.</string>
     <string name="room_participants_action_unignore">Unignore</string>
 
     <string name="room_participants_action_cancel_invite_title">Cancel invite</string>