Confirming this bug completely (number 3 is the simplest and reliable way to reproduce), I have to say that closing the search window by clicking on the panel icon does not reproduce the bug (can be added to number 4).
Confirming this bug completely (number 3 is the simplest and reliable way to reproduce), I have to say that closing the search window by clicking on the panel icon does not reproduce the bug (can be added to number 4).