Please mark as resolved, https://toolslib.net/downloads/finish/1/ was the fix. The thing found a PUP in my wifi and browser, so it got fixed. Thank you!
it was most likely a modified minecraft version (a.k.a. modded branding) of the game. The entity id was changed, and rendered, but the player was still controlling it
for now, just use `sudo dpkg -i Minecraft.deb` when you download it.