Of course there is. Why won’t they censor stuff they might not like? It’s a private website of a private entity monetising all of us. The more you post here, the more value you create for them. So they try to balance here, but since there’s no moderation log, things can be hid on a whim.
On top of that, personally, I saw plenty of evidence for a clearly biased approach, even despite them claiming otherwise. Why won’t they claim it, after all?