I use Firefox + ublock and noticed the youtube comments dissappearing as well.
Im not knowledgeable enough to really understand what I'm actually doing when i use this "fix" but - i noticed if i disable cosmetic filtering in Ublock, comments reappear, but they dissappear again when enabling cosmetic filtering again.
Not sure if that'll apply to you but that's about all i know.
I use Firefox + ublock and noticed the youtube comments dissappearing as well.
Im not knowledgeable enough to really understand what I'm actually doing when i use this "fix" but - i noticed if i disable cosmetic filtering in Ublock, comments reappear, but they dissappear again when enabling cosmetic filtering again.
Not sure if that'll apply to you but that's about all i know.