Need Visual Pinball wizards! Graphics rendering issue

[NitzerSmeg]

I've got an unusual setup that is having graphical issues with some VPX tables.
I use Steam as a FE and setup the tables as "non-steam games". I built a hanging arcade so using Steam allows my players to switch between arcade and pinball seamlessly.

Only issue is a few tables render incorrectly. Either the Pup windows show correctly and the table is rendered badly or, when using a different version of VisualX like GL64, the same table renders fine, but the Pup windows are no longer visible.

 

This only occurs on a handful of tables and only when kicking them off through Steam. I tried disabling "Steam overlay" but there was no change. Any ideas??