Since there has been an update on Modern 6 to avoid cutting it (which is pretty idiot to me), the record is not beatable anymore.

Modern 6 should be reset, so then we're able to compete for it as we should.

Here are the blocks (the blue blocks on the screen are barriers that are not visible in game) making the record unbeatable.

It should lol

I've cleared the affected runs for Java Edition of Modern 6, although I'm not sure if this problem is also present in Bedrock Edition. If this issue afflicts Bedrock as well, those times can be cleared too.

update one month later: not a problem on bedrock edition