i blocked some channel by id, but comments from it are still visible

there are 3 people. one is me, other one is the channel i want to block, and last one is the video uploader.

i was watching a video and its comments (sorted by recent) and saw an unwanted comment.

so i blocked the channel of the author of that comment,

but although i refresh, close and reload the tab and check the comment section of that video again,

i still can see the comment alive, even though i manually add filter by exactly same comment content.

my environment is windows 10 ms edge.

also i use ublock origin, pockettube extensions too.

and i don't subscribe youtube premium membership.

am i doing wrong? thank you😊

amitbl / blocktube