Pokémon XD : Full screen problem at the Realgam Tower

[Asia81]

In this room of Realgam Tower in Pokémon XD (PAL version), you can encounter some strange fullscreen problems.
From 4:3, it goes to 16:9, go back to 4:3, and again.

I'm using the last nigthly build of Dolphin (currently 5.0-8201).

Demonstration here, 2 screenshots and 1 video:
https://nsa39.casimages.com/img/2018/06/22/180622045239953186.png
https://nsa39.casimages.com/img/2018/06/22/180622045240453213.png
https://youtu.be/TwAF3pmda90

Any fix, even if it's not a big deal?

[Neui]

This seems to be an issue when "Aspect Ratio" (in the graphics settings) is set to Auto. (If on Auto, Dolphin tries to auto-detect the aspect ratio, which seems to fail here)
Either set it to "Force 4:3" or use the 16:9 cheat code.