So if someone replies to a post and then someone replies to the reply then the original replier deletes their comment that might explain the duplication and spinny thing 💡 . Have I just solved the problem? Quick test it out.
I swear the spinny thing used to show up more regularly when there were a large number of comments, and not just with deleted comments (I'd view the same thread while logged in on a desktop browser and be able to see more). Never mind, that must be a relic now...
It does suck when it's so easy to accidentally delete comments on mobile at least when you open the editing interface - but then, if that happens you can actually undelete your comment from the same interface for a bit afterwards by clicking on the bin button again
I think what we need to do now is find out why comments collapse after 300+. If that could be fixed then if someone does delete a comment spinny thing comes out but doesn't fuck with chain.