stuck keyboard grab after DND ?

Submitted by Matthias Clasen @matthiasc

Link to original bug (#786848)

Description

To reproduce:

open the gtk4-demo clipboard demo enter some text in the first entry, select it drag the text into the background of the dialog, so that the drag fails now try to enter more text in either entry it doesn't work

this only happens for the first drag attempt

Version: 3.91.x