YouTube autodeletes a lot of comments and it's a weird little game trying to compose a comment that doesn't get autonuked. There's probably some sort of semi-unpredictable ML shit along with manual interventions to """the algorithm""". If I have to make a provocative comment on YouTube I compose it in a text editor to my liking, copy-paste, confirm that it actually got posted, and tweak the composition if it turns out it didn't.