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I was playing around with RMXPAce and tried porting an older game.
With RMXPAce I get the left image and without it the right image.
I also get the right image when I use XP Ace Tilemap & XPA_Window
standalone without the rest of RMXPAce.

https://imgur.com/a/A7x4UyY

Do you have an idea what could cause this rendering problem ?
The script is perfectly fine and has throws no errors.

The problem of not displaying the graphics only happens in certain scenes,
but works the rest of the time.