Close, restore, minimize icons disappear sometimes

[aloha]

I have a dual wide screen system and currently use Download Stuido 5.1.3.0. Sometimes the icons in the right upper corner (close, restore, minimize) disappear when the window is maximized (see attached screenshot). They reappear when I double click on the top bar (equivalent of restore command), and then maximize again. I hope you will be able to reproduce and fix the problem.

It is funny, I submitted the post and noticed your closing X for viewing the submitted pictures is right in the middle of the problem area. Can you change your viewer (add a margin on top or move the X icon) so that your closing X icon is outside the picture area.