The viewport menu disappears

I’m working on a workflow that consists of multiple shot tracks in a master sequence. It seems that it usually takes 15 to 30 minutes for the problem to occur.

I use dual monitors, the main monitor is lying down (horizontal monitor) and the sub-monitor is in an upright position (vertical monitor). I’ve had a bug in the past where the UI’s position was misaligned when using a vertical sub-monitor in a 2D animation program called TVPaint Animation. Could this also happen in UE? I’m not sure.

Anyway, I tend to work with a sequencer on the sub monitor, but at some point when I look at the main monitor, the toolbar is hidden. So I can’t pinpoint exactly when the toolbar disappears. I’ll use OBS Studio to record the screen, figure out exactly what action the toolbar disappears, and write a follow-up reply.