fix: add return for loading indicator in post screen

CHANGELOG.md

@@ -1,6 +1,7 @@
 ## 4.1.0
 - Migrate to flutter 3.22 which deprecates the background and onBackground properties in the ThemeData and also removes MaterialStatePropertyAll
 - Add categorySelectionButtonSelectedTextColor and categorySelectionButtonUnselectedTextColor to the timeline theme to allow for the customization of the text color of the category selection buttons
+- Show loading indicator when loading a post in the post screen
 
 ## 4.0.0
 

packages/flutter_timeline_view/lib/src/screens/timeline_post_screen.dart

@@ -112,7 +112,7 @@ class _TimelinePostScreenState extends State<TimelinePostScreen> {
     var timeFormat = widget.options.timeFormat ?? DateFormat('HH:mm');
 
     if (isLoading) {
-      const Center(
+      return const Center(
         child: CircularProgressIndicator.adaptive(),
       );
     }