Subscribe pop-up fullscreen

Hi.

I was in full screen mode (which I used very rarely so far) when the subscribe pop-up but took almost the whole screen. Couldn't do anything to close it (escape or clicks outside). Had to go in the task manager and after that it disappeared somehow. First time it happened and with a very strange behavior.
Luckily I was home and not in a gig.

Did any one else experiences that issue?

On 7.2.17 ver.
On windows 10

I expect to be requested to update to .18 version and see if the issue occurs again. But I saw on the community that there are sont issue with latest version on FLX4, so I'd rather prefer to stick to .17 for now.