It's even worse than that : I had some comments deleted but others shadowbanned (!), merely from using timestamp links to the same video and/or posting multiple

It's even worse than that : I had some comments deleted but others shadowbanned (!), merely from using timestamp links to the same video and/or posting multiple comments and/or writing long comments ! (And I first noticed it about a year ago.) P.S.: Even the deleted comments are deleted silently.