Replies dissappearing when u cant delete replies

idk if its just me but ive been having replies under my comments dissappear. like today i had someone reply to me asking me smth and i went to double check my info for my reply for like 5 minutes. then boom gone. i also looked through my comments on my page to see if i could find it then i realized on some of my other recent comments the replies i remember reading were gone. do we have the delete function back? are they still there and i just can see them?