click a little off. window collapze ;-(

[rsrsrs]

Hey,
if i click a little off, next to the arrow on the small bright stripe,
the window collaps from fullscreen to window.
and this happen quite often ... this is annoying.
and i have to press to times (Num) 8.

that was not the case in the past!

any idea what to do?

Windows 10
Xara Designer Pro X 17.1.0.60742 DL x64 Dec 9 2020