[Plugin: BuddyPress Activity Stream Hashtags] Odd Behavior: Some linking, some not

Hello-

Noticing some interesting behavior at my course site.

My tweet, which is synced using BuddyStream, has been pulled into the course site:
https://learn.thecorkboard.org/members/kyle/activity/145

But the hashtag “#slis644” hasn’t been linked as can be seen. However, it doesn’t show up in the hashtag archive:
https://learn.thecorkboard.org/activity/tag/slis644?

Which is odd considering that other students who have done the same thing with syncing their Twitter accounts are having their Tweets in the archive, some with and some without links.

Thoughts?

Thanks,
~Kyle~

https://www.ads-software.com/extend/plugins/buddypress-activity-stream-hashtags/