I have that same problem intermittently. Normally just clicking the down button opens up comments. When that doesn't work sometimes it works to actually click on the word 'Comments' and they magically appear. And sometimes not even that works. I think it's been about a week that I've noticed this issue.

I have something worse than that happen .... of an IT nature https://voat.co/v/pizzagate2/1514517

I sometimes have NO comments showing at all on popular vids that must have dozens of comments. But then I think it's just me and I need to reboot or something to clear the cache.

Can't see/write comments, either. Just the number of comments. Lots of these platforms seem to be changing their usability daily. Fake news will be dealt with swiftly, get back in line goy...