I had the saw disappearing bug a few times when I tested the game, but it was so rare and non-reproducible. I failed to figure out what was causing it. Perhaps it's just Godot physics engine moment. It's very annoying, sorry for that.
I think its not that Bad. It didnt Happen in my playthrough. :) Maybe we can just put an invisible wall out of screen Which repells the Magnet as bugfix After Jam? Dont know if this is possible with coder-magic? :D