Thanks.

It sounds like the issue has already been fixed in Electron, although it will obviously take a while for all app vendors to bump versions.

I'm guessing Zoom might be hitting the same overridden system call that Electron was, although I have no firm information that this is the case.

Regardless, I've just checked my settings to ensure this upgrade won't be installed automatically because I wasn't sure how MacOS behaves with major upgrades, and will probably wait 2 - 3 months before letting Tahoe onto my system to allow everyone else time to get their fixes and upgrades done.