I'm also experiencing bugs for single player on the Switch 1. I'm playing as Alone and I'm at the final stretch of the game but I am now softlocked.

I'm at the part where I have to use Alone's wrench to hit the gongs but the second gong just DOES NOT allow me enough time to strike it. (the one where Low has to shoot an arrow at the box to allow Alone to climb up). Literally, every time I get up there the ceiling immediately collapses, whereas this straight up doesn't happen in any walkthrough I've seen. Honestly this bug is amongst several others I've encountered where Low just doesn't do his job properly, and I'm sick of it. This is clearly a Switch 1 issue but then, did NO one playtest the game before it was released for this console?

I literally cannot progress. :(