[Wonderland XIII demo] Disc flip fails on current unstable core (Regression?)

[vanfanel]

Hi there,

Using latest unstable C64 core (https://github.com/MiSTer-unstable-nightlies/C64_MiSTer/releases/download/unstable-builds/C64_unstable_20251210_00f1d7.rbf) with latest unstable MiSTer Main (https://github.com/MiSTer-unstable-nightlies/Main_MiSTer/releases/download/unstable-builds/MiSTer_unstable_20260103_17b4fe), the Wonderland XIII demo (https://csdb.dk/release/?id=151275) fails to detect disc change at the end of disc 1.

It seems to work on latest stable C64 core, so maybe it's related to some of the latest changes to the core, so it could be a regression I guess.

[vanfanel]

I can confirm this is a regression: with latest stable C64 core, the disc flip is correctly detected, but it fails with current unstable core.