Upon completion of the Brauner cutscene upon entering his portrait, the game locks on a solid white top screen and solid black bottom screen. This happens regardless of whether the cutscene is skipped or mashed through. This was tested on the 1.0 RC of MelonDS,. This lock does not happen on the DeSmuME stable and nightly builds. Attached is the spoiler log and I can provide additional files if requested. I assume it has something to do with boss randomization (which was Medusa) as this is a problem I've run into several times over maybe 50 seeds.
PoR Witch'sFrozenRice - Spoiler Log.txt