BuddyPress activity pluss missing posts (view link not working)

Good morning!

we are experiencing an odd issue where some users – just a few – post items on the activity stream, but they don’t actually post. They show up in the header “cover” area, but the “View” link shows: https://www.vegantravel.com/activity/p// (missing the activity post number) in stead of something like this: https://www.vegantravel.com/activity/p/4755/

One of the users that demonstrate this issue is: https://www.vegantravel.com/members/food4thoughtvegan/

another: https://www.vegantravel.com/members/vegannomad/

Most other users are able to post as normal – the top user was able to post just yesterday

Neither of the broken posts show up in the back-end activity feed either.

Any ideas?

Thanks!

WordPress Version: 4.5.2

BuddyPress Version: 2.5.2

BuddyPress Activity Plus: up-to-date