Hello. There is nothing critical. Byt:
1) create new group
2) create story post with hashtag
3) pin this post
4) click on hashtag
Result: You can see pinned post with hashtag, but also you can see text

COM_EASYSOCIAL_STREAM_NO_STREAM_ITEM_FROM_CUSTOM="No items associated with this hashtag"

I solved it just ba changing to:
"No MORE items associated with this hashtag"

Thanks.