diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/helper/ChunkEntityHelper.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/helper/ChunkEntityHelper.kt
index 9a89eea00f..aa1bb401ab 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/helper/ChunkEntityHelper.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/helper/ChunkEntityHelper.kt
@@ -128,7 +128,7 @@ internal fun computeIsUnique(
     }
 }
 
-val rrDimber = Dimber("ReadReceipts", DbgUtil.DBG_READ_RECEIPTS)
+private val rrDimber = Dimber("ReadReceipts", DbgUtil.DBG_READ_RECEIPTS)
 
 private fun handleReadReceipts(realm: Realm, roomId: String, eventEntity: EventEntity, senderId: String): ReadReceiptsSummaryEntity {
     val readReceiptsSummaryEntity = ReadReceiptsSummaryEntity.where(realm, eventEntity.eventId).findFirst()
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/mapper/ReadReceiptsSummaryMapper.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/mapper/ReadReceiptsSummaryMapper.kt
index 4375b5c83a..cbab183967 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/mapper/ReadReceiptsSummaryMapper.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/mapper/ReadReceiptsSummaryMapper.kt
@@ -32,7 +32,7 @@ internal class ReadReceiptsSummaryMapper @Inject constructor(
         private val realmSessionProvider: RealmSessionProvider
 ) {
 
-    val rrDimber = Dimber("ReadReceipts", DbgUtil.DBG_READ_RECEIPTS)
+    private val rrDimber = Dimber("ReadReceipts", DbgUtil.DBG_READ_RECEIPTS)
 
     fun map(readReceiptsSummaryEntity: ReadReceiptsSummaryEntity?): List<ReadReceipt> {
         if (readReceiptsSummaryEntity == null) {
@@ -52,7 +52,7 @@ internal class ReadReceiptsSummaryMapper @Inject constructor(
     private fun map(readReceipts: RealmList<ReadReceiptEntity>, realm: Realm): List<ReadReceipt> {
         return readReceipts
                 .mapNotNull {
-                    rrDimber.i{"Map ${it.eventId} receipt ${it.userId} thread ${it.threadId}"}
+                    rrDimber.i{"Map ${it.roomId} / ${it.userId} thread ${it.threadId}: event ${it.eventId}"}
                     val roomMember = RoomMemberSummaryEntity.where(realm, roomId = it.roomId, userId = it.userId).findFirst()
                             ?: return@mapNotNull null
                     ReadReceipt(roomMember.asDomain(), it.originServerTs.toLong(), it.threadId)
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/handler/room/ReadReceiptHandler.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/handler/room/ReadReceiptHandler.kt
index d34806f6c3..16c9ed8ef7 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/handler/room/ReadReceiptHandler.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/handler/room/ReadReceiptHandler.kt
@@ -49,7 +49,7 @@ internal class ReadReceiptHandler @Inject constructor(
         private val roomSyncEphemeralTemporaryStore: RoomSyncEphemeralTemporaryStore
 ) {
 
-    val rrDimber = Dimber("ReadReceipts", DbgUtil.DBG_READ_RECEIPTS)
+    private val rrDimber = Dimber("ReadReceipts", DbgUtil.DBG_READ_RECEIPTS)
 
     companion object {
 
@@ -129,6 +129,7 @@ internal class ReadReceiptHandler @Inject constructor(
             summariesByEventId[eventId] = readReceiptsSummary
         }
         mainReceiptByUserId.forEach {
+            rrDimber.i{"Handle initial sync RR $roomId / ${it.value.userId} thread ${it.value.threadId}: event ${it.value.eventId}"}
             summariesByEventId[it.value.eventId]?.readReceipts?.add(it.value)
         }
         realm.insertOrUpdate(readReceiptSummaries)