Hi!
I’ve looked up the plugin source, but I believe it should return the correct link, as it uses the default BuddyPress method to request the permalinks, so I’m not sure what the cause is yet.
I have custructed 2 different custom code solutions that may help resolving this. Add this custom code to the functions.php in your theme/child theme directory (copy from line 3 only!). Before editing, please make sure to have a full site back-up just in case. Let me know if you need help with these.
Try this one first:
..if the first one does not work, remove it, and try this one:
Let me know!