Technical dificulties or user error?

Posting here because this is the only group ive noticed it happen in, but that could be because this is the group where my posts get the most comments? But am i doing something wrong or does anyone else have this peoblem? When my posts get a lot of comments and im scrolling through them, most times it wont let me see all the comments. It just starts repeating comments ive already scrolled past? I know there used to be an option where i could see comments in order and see thenrecent ones first but i cant do that anymore either. Sometimes i have to click out of a post and go back to it multiple times before i can find the comment im looking for