diff --git a/CHANGES.md b/CHANGES.md
index 64de4ac68df..5e9f9ce6710 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -14,6 +14,7 @@ Other changes:
 Bugfix 🐛:
  - Do not show long click help if only invitation are displayed
  - Fix emoji filtering not working
+ - Fix issue of closing Realm in another thread (#725)
 
 Translations 🗣:
  -
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/filter/DefaultFilterRepository.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/filter/DefaultFilterRepository.kt
index 53967784a1e..33cd245a423 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/filter/DefaultFilterRepository.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/filter/DefaultFilterRepository.kt
@@ -30,25 +30,26 @@ internal class DefaultFilterRepository @Inject constructor(private val monarchy:
     override suspend fun storeFilter(filterBody: FilterBody, roomEventFilter: RoomEventFilter): Boolean {
         return Realm.getInstance(monarchy.realmConfiguration).use { realm ->
             val filter = FilterEntity.getFilter(realm)
-            val result = if (filter.filterBodyJson != filterBody.toJSONString()) {
-                // Filter has changed, store it and reset the filter Id
-                monarchy.awaitTransaction {
+            // Filter has changed, or no filter Id yet
+            filter.filterBodyJson != filterBody.toJSONString()
+                    || filter.filterId.isBlank()
+        }.also { hasChanged ->
+            if (hasChanged) {
+                // Filter is new or has changed, store it and reset the filter Id.
+                // This has to be done outside of the Realm.use(), because awaitTransaction change the current thread
+                monarchy.awaitTransaction { realm ->
                     // We manage only one filter for now
                     val filterBodyJson = filterBody.toJSONString()
                     val roomEventFilterJson = roomEventFilter.toJSONString()
 
-                    val filterEntity = FilterEntity.getFilter(it)
+                    val filterEntity = FilterEntity.getFilter(realm)
 
                     filterEntity.filterBodyJson = filterBodyJson
                     filterEntity.roomEventFilterJson = roomEventFilterJson
                     // Reset filterId
                     filterEntity.filterId = ""
                 }
-                true
-            } else {
-                filter.filterId.isBlank()
             }
-            result
         }
     }