Debian 12, Zoom in KDE X11 - Strange chat window issue

I know about the issues with Zoom, and in particular Zoom on Wayland. I use Debian 12, kernel 6.1.0-18 (Bluetooth issues on later kernels) with KDE on X11. So I primarily use the web app, which works really well on the whole.

Occasionally, I need to use the app (reasons below for clarity, but not what I'm asking about):

• When doing a presentation, for example, sharing the screen still allows you to see the other people on the call.
• Controlling somebody else's presentation in the web view just doesn't work (they can't give you control, as you don't appear in the list).

I have also tried using the Flatpak and had issues (which I cannot remember).

Whenever I use the Zoom app, using the native web app downloaded from https://zoom.us/client/latest/zoom_amd64.deb, I have weird issues when I click the chat window. The mouse pointer turns into the icon used when dragging a window and I cannot click anywhere in Zoom (none of the buttons work, keyboard shortcuts, I can't type in the chat box). But the call continues.

This has happened over and over again in different kernel versions of Debian 12 and different versions of Zoom client (I noticed this maybe 6 months or so ago, so have been regularly trying it since then).

I have searched for an answer and for something close, and have never found anything (I could be searching for the wrong thing).

Does anybody have any suggestions?