Describe the bug
On some part of my screen, WA is capturing my click.

Do you have an error log of what happened?
No error.

To Reproduce

1. 🤷
2. You now have part of your screen that capture you click

Did you try having WeakAuras as the only enabled addon and everything else (especially something like ElvUI) disabled?
No.

Which version of WeakAuras are you using?
2.12.0-beta6

Was it working in a previous version? If yes, which was the last good one?
First time seeing that bug.

Additional context
WeakAuras.zip

Doing fstack on part of my blocked screen show this frame:

Doing fstack on part not blocked doesn't have this frame.

Without proof and minimal reproducible example i don't see how can i "fix" your "problem"

This should be fixed for the next release.