I’m beginning to think this may be related to some combination of NVIDIA on Wayland with KDE. I’m observing several other quirks in window appearance, etc. (see my other post).
@Bink What is your system running?
Others that responded to this thread that you couldn’t replicate the issue, what about your systems?
NOTE: I have switched to using X11 to eliminate Wayland as a variable. I see the same behavior there; i.e., first drag-drop works, subsequent do nothing.