According to other community reports, LWJGL, the rendering library used by Minecraft, switches its MemoryUtil back-end from Unsafe to FFM on Java 25. However, JIT in Java 25 seems can’t works well with FFM back-end, and causing performance issue.
So theoretically, if you try to launch older version with Java 25, and this issue also appears, then we can confirm this issue is related to the back-end switch.
Developers of LWJGL and other community members are still investigating this issue on Github: https://github.com/LWJGL/lwjgl3/issues/1111
It’s no longer an issue, thanks
uh seems the service just comes back right now
According to ProtonDB, legacy Minecraft Dungeon could work file on Linux platform, so why not Minecraft Dungeon II? I think MCD team has the ability to solve this issue, rather than just close the report and abandon all Linux/macOS users.
BTW I’ll repost my screenshot here to sync my problem, since my report is closed as duplicate to this issue.