Adds clearing to directParentNames

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/summary/RoomSummaryUpdater.kt

@@ -224,6 +224,7 @@ internal class RoomSummaryUpdater @Inject constructor(
                     .sort(RoomSummaryEntityFields.ROOM_ID)
                     .findAll().map {
                         it.flattenParentIds = null
+                        it.directParentNames.clear()
                         it to emptyList<RoomSummaryEntity>().toMutableSet()
                     }
                     .toMap()

vector/src/main/java/im/vector/app/features/home/room/list/RoomSummaryItemFactory.kt

@@ -207,7 +207,7 @@ class RoomSummaryItemFactory @Inject constructor(
 
     private fun getSearchResultSubtitle(roomSummary: RoomSummary): String {
         val userId = roomSummary.directUserId
-        val directParent = roomSummary.directParentNames.lastOrNull()
+        val directParent = roomSummary.directParentNames.takeIf { it.isNotEmpty() }?.joinToString()
         val canonicalAlias = roomSummary.canonicalAlias
 
         return (userId ?: directParent ?: canonicalAlias).orEmpty()