Main top header/toolbar goes missing

Main top header/toolbar goes missing every once in a while ever since I upgraded to a 4k monitor. It goes missing and there is nothing I can do. I can’t access any of the menus.

I’m talking about the main toolbar that shows : File - Edit - Project - Audio - MIDI etc…

I then need to completely close Cubase for it to re-open and since I cannot see the header, I need to shut it down using the task manager.

Pretty major bug if you ask me.

I’m on version 9.5.2.10 build 79.

Anyone else is having this bug?