PrBoom fails to start in RetroArch v1.11.0+ on a Nintendo 2DS XL

Description

PrBoom fails to start when prboom.cfg file exists already on a Nintendo 2DS XL device. PrBoom works fine in RetroArch v1.10.3 version. It'll give a black screen when running in 1.11.0+. PrBoom core hasn't changed since 1.10.3, so I suspect it's a regression in the RetroArch backend.

Expected behavior

PrBoom loads.

Actual behavior

PrBoom fails to load and stuck on a black screen.

Steps to reproduce the bug

1. Load Doom through PrBoom core.
2. Start a game so that the prboom.cfg file is created.
3. Quit the game and close RetroArch.
4. Restart RetroArch.
5. Load Doom again, this will now give a black screen.
6. Deleting the prboom.cfg file in the cores folder will allow the game to start properly again.

Bisect Results

This works fine in RetroArch 1.10.3.

Version/Commit

You can find this information under Information/System Information

• RetroArch: 1.11.0 and above.

Environment information

• OS: Nintendo 2DS XL with 11.16 firmware

Reproduce the failure using an existing prboom.cfg on a Nintendo 2DS XL, comparing RetroArch 1.10.3 with 1.11.0 and later versions. Start by bisecting the regression and tracing the RetroArch configuration-loading path involved when PrBoom starts. Done means PrBoom loads successfully with prboom.cfg already present, without requiring the file to be deleted.