Fix issue where over optimization was causing crashes due to the diffable datasource not being available

iOS/SceneCoordinator.swift

@@ -343,16 +343,12 @@ class SceneCoordinator: NSObject, UndoableCommandRunner, UnreadCountProvider {
 					}
 				}
 			}
-			
+
+			rebuildBackingStores(initialLoad: true)
+
 			// You can't assign the Feeds Read Filter until we've built the backing stores at least once or there is nothing
 			// for state restoration to work with while we are waiting for the unread counts to initialize.
 			if let readFeedsFilterState = windowState[UserInfoKey.readFeedsFilterState] as? Bool {
-				if readFeedsFilterState {
-					treeController.rebuild()
-					rebuildShadowTable()
-				} else {
-					rebuildBackingStores(initialLoad: true)
-				}
 				treeControllerDelegate.isReadFiltered = readFeedsFilterState
 			}