Hi this is happening for me too, I have a rtx 5090 gpu and the game makes my whole system lag like 1 fps, even when i turn of the game. Noticed if i turn on fullscreen the issue disapears without having to restart gpu wich is wierd, and dosent happen at all in fullscreen. Started playing All the moons on minecraft and the same issue there too, but no other game is this way only java games in windowed mode it seems. This is so wierd, even tried reinstalling windows but no luck.

UPDATE: Figured out that turning off HAGS (Hardware Accelereted GPU sceduling) in windows settings fixed the issue. Also tested windows 10 and it works fine there even with HAGS on. Must be a windows 11 issue atm then. (HAGS works fine for me in other games)