The post was first normal, I clicked on the post and I think like very quickly also clicked somewhere else, and then it was suddenly stuck like this. Still clickable if no other post is in front of it.
I tried to reproduce this for a while but was unable to get a reproduction. This makes it difficult to fix. Unfortunately without a reproduction I cannot do anything to fix the issue. If you ever figure out a way to reproduce this please let me know. Thank you.
The same thing happened to me yesterday when I was browsing community after community in an instance. The app got very laggy and right before it froze entirely I got the bug. I doubt this is any more useful though, just thought I would mention it anyway.