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 f3770e4afe..2be4510b6f 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
@@ -16,8 +16,11 @@
 
 package org.matrix.android.sdk.internal.database.mapper
 
+import io.realm.Realm
+import io.realm.RealmList
 import org.matrix.android.sdk.api.session.room.model.ReadReceipt
 import org.matrix.android.sdk.internal.database.RealmSessionProvider
+import org.matrix.android.sdk.internal.database.model.ReadReceiptEntity
 import org.matrix.android.sdk.internal.database.model.ReadReceiptsSummaryEntity
 import org.matrix.android.sdk.internal.database.model.RoomMemberSummaryEntity
 import org.matrix.android.sdk.internal.database.query.where
@@ -32,14 +35,22 @@ internal class ReadReceiptsSummaryMapper @Inject constructor(
             return emptyList()
         }
         val readReceipts = readReceiptsSummaryEntity.readReceipts
-
-        return realmSessionProvider.withRealm { realm ->
-            readReceipts
-                    .mapNotNull {
-                        val roomMember = RoomMemberSummaryEntity.where(realm, roomId = it.roomId, userId = it.userId).findFirst()
-                                ?: return@mapNotNull null
-                        ReadReceipt(roomMember.asDomain(), it.originServerTs.toLong())
-                    }
+        // Avoid opening a new realm if we already have one opened
+        return if (readReceiptsSummaryEntity.isManaged) {
+            map(readReceipts, readReceiptsSummaryEntity.realm)
+        } else {
+            realmSessionProvider.withRealm { realm ->
+                map(readReceipts, realm)
+            }
         }
     }
+
+    private fun map(readReceipts: RealmList<ReadReceiptEntity>, realm: Realm): List<ReadReceipt> {
+        return readReceipts
+                .mapNotNull {
+                    val roomMember = RoomMemberSummaryEntity.where(realm, roomId = it.roomId, userId = it.userId).findFirst()
+                            ?: return@mapNotNull null
+                    ReadReceipt(roomMember.asDomain(), it.originServerTs.toLong())
+                }
+    }
 }