Woah, that is wild, I hope you did some bug reporting about that, for something to go so insanely wrong it would have to be a fairly bad bug but also hard to find. Cool trick though, “Check this out, Copy ate my Y key, I am without purpose!”

To clarify, those are the default keybindings, but you can change them to match your needs or expectations. I like the alt tilde for windows within a program switching, it works fairly well though I have not set it up on my current machine yet.

Revengers, resemble!