This happens very consistently scrolling through dozens of posts. Can be anywhere between 5-15 minutes. Typically it happens around 10 minutes.

Not sure if it's related, but I was looking at this post in the all feed when doing some quick testing. The comments were repeatedly getting redisplayed when scrolling to the bottom.

https://lemmy.world/post/1327422

I signed up to the beta, not sure if that was the comment navigator bug fix update I just got - looks like version 1.0.76. Periodically when scrolling through the comments, whereas before it would just load duplicate chains of comments it empties the comment chain, I.e. the comment section goes blank, then seems to repopulate it with extra duplicates or something. There seemed to be many hundreds of comments for that post after repeated scrolling for a few minutes.

For the most part, posts with less than 60 comments don't appear to exhibit this bug.

Using a Galaxy Tab S4, confirmed on an S21 Ultra also.

Thank for the app, I really enjoy using it. Hopefully this helps.