Thanks for looking into this. I solved the issue. This was not due to the wordpress or the plugin version. This problem happens when number of tags grows. The problem is caused by the “Tag, category, author and post id filters” section of the plugin both in the main tab and widget. This box tries to load all the tags without any pagination into a select box and as a result when number of tags are large it blocks the whole page till all tags are loaded into the select box. It might be better you let the user to type the tag instead of giving the user a large select box.
I just commented out “adinj_filters_box()” from ui-tab-main.php and everything loads just fine in the main tab. I did the same for the widget as well.
