I keep missing the vote buttons and accidentally tap on comments which then collapses them. I’ve accidentally collapsed/expanded some comments several times trying to vote.
Is there a setting somewhere I’m not seeing that changes this? Maybe to a long press or force needing to use the three dot menu to collapse instead.
Try turning on “Show Content For Collapsed Comments” in Look and Feel. That will prevent a comment from disappearing underneath you if you accidentally collapse it - only its children will disappear instead.