Please provide us with one of the link to the activity stream item so that we can investigate this.

https://www.speakeasyenglish.org/site-groups/54-english-boos-material
the above link is the latest of many
other links can be used, such as links to events and other groups, you will always see the number displayed in the description when sharing to social media.

here is another link to an event
for sure if you try to share this to FB you will see a number at the end of the description
https://www.speakeasyenglish.org/site-groups/98-wednesday-virtual-class-group/events/117-wednesday-webinar-discovery

I've help you disabled this setting 'Allow Duplicate Title For Clusters' from backend, it shouldn't append those id behind of that tile now.

But if you would like to share group or event on your social network (Facebook) again for the same page URL, you have to clear those cached data from Facebook debugger tool https://developers.facebook.com/tools/debug/ , so it will load the latest meta data wen you share.

By the way, this setting description got a little bit misleading for me, I will see if we can update this in next version.

Okay, I already consult with our developer regarding this, it seems like that is a bug for this.

I have help re-enabled back this setting "Allow Duplicate Title For Clusters" and I've applied some fix into this file on your site as well JoomlaFolder/administrator/components/com_easysocial/includes/cluster/cluster.php

It shouldn't append that id when you share the group/event link in social network.

But do take note with this :

But if you would like to share group or event on your social network (Facebook) again for the same page URL, you have to clear those cached data from Facebook debugger tool https://developers.facebook.com/tools/debug/ , so it will load the latest meta data wen you share.