Hm. Comments from private accounts on ANY post are only visible to people approved to follow those accounts. Not sure I like that
it's even worse because not only is the idea "well we won't fix private accounts being able to leave comments on other account's posts and we won't fix incorrect comment counts so just suck it up" but also just the baseline concept that if you use a private account you just. don't get to interact outside of your own posts whatsoever!
(and by the way there's almost no way it's a hard fix. it's incredibly easy to just verify the number from the server with the number of visible comments actually served to the user. i would know, i made a fix for that in like an hour. yes i will die on this hill)
I don't think that's a normal thing to say in response to someone not liking how a social media website handles social interactions...