Reddit Android app is hiding posts I never hid or even clicked on

I have seen this happen occasionally for a few months: the main feed on my reddit app switches to almost even post saying "Post hidden". Today I tried troubleshooting and found a video showing how to see the posts that you have hidden, by looking in your profile-> history. I see dozens of posts from 9h ago, more from 10h ago, etc.

I have never hidden a post, and haven't reported one in months. Is some bot or glitch making Reddit think that I am hiding a huge number of posts?

Since posting this in r/help and following suggestions there, I cleared cache (kept happening) and reinstalled the Reddit app (kept happening).