Game constantly crashes on native screen res: 3840 X 2160 HEEEELP!!

Hi Garry and folks at Facepunch I bought myself a 4K screen and was able to play Rust on it for approx 2 weeks, and Rust looks beautiful on it! However after the latest update (belive it was yesterday) It instantly crashes after I join a server, buut if I play in lower res it works :S and therefore it only runs in windowed mode, and it sux tbh, hope you will fix it soon!

All the best!