Stuck display process
What it means
PinUpDisplay.exe stayed running after the last table — it can block the next one.
Why it happens
The backglass display process didn't exit cleanly and stays in memory with nothing using it.
How Pincab Toolbox detects it
The PinUpDisplay.exe process is running in memory while no Visual Pinball process (VPinballX/VPinballX64/VPinballX_GL64) is active.
Automatic repair
Repair, included in the Pincab Toolbox licence, can fix this one for you.
Check your own pincab
Pincab Toolbox is a free Windows scanner for Visual Pinball X and PinUP Popper. It finds and explains problems like this one. No account, no telemetry.
Download for freeCovered: Visual Pinball X (10.x) and PinUP Popper. Not covered: Future Pinball, Pinball FX, Visual Pinball 9 and the other frontends (PinballX, PinballY).