Closes when try to change window size with a specific setting

4.20.0
Possible Bug

If you have the following setting turned "on"
Close window when focus is lost
and then you try to adjust the size of the window by
-dragging window edges with mouse -using modifier such as ALT+RMB drag then the AppFinder window closes instantly.

If you turn this setting "off" then these two actions work fine.

Thank you to anyone who reads this