Oh man this same problem drove me insane too. Sorry to say, I never found a solution.
I also had a hidden/invisible floating group within a reuseable header that overflowed below the bottom of the header, which wouldn’t let you click on the element behind it.
I was trying build a floating mobile menu that takes up the whole screen, but obviously because of this problem I had to just use a normal group instead. (bubble really needs to provide a solution to building a custom mobile menu other than the standard plugin they have, it’s quite frustrating).
Anyway, this is I how I worked around this problem in my app, if you want to check it out.