My guess is that this is probably a CSS issue in your theme. However, it’s a bit hard to judge without a link to your site. Would you be able to provide one please?
This issue could be related to your other topic https://buddypress.org/community/groups/how-to-and-troubleshooting/forum/topic/whats-new-textbox-is-a-hyperlink-from-the-activity-page-to-the-activity-page-cycle-wierd/
Since your layout in 2nd install on a test domain is working fine, have you tried re-uploading the Modular_BuddyPress_Child_Theme folder/files to your server manually wp-content/themes/modular/
Thanks for the reply. I have tried that and it did not help. Any other ideas? I’ve tried to recreate the error on my test site by duplicating my steps on my live site but have not succeeded in doing do yet.
Thanks for your help.