Strange White Shape in Game Mode

Hi everyone. I have a strange issue with deck mode. I've noticed when I using the bazzite-deck version on my Gmktek k8 plus mini PC(AMD 8845sh) and connected to a Sony TV. The issue is ever time I change back from desktop mode it has some white shape that appears randomly on my screen as the photo shows. I've also found when back to desktop mode the screen colour looks off and appears washed out. I've tried to install the desktop version and those problem seems not appearing anymore. However since I'm quite like the deck version which has the easy access for locking fps and change frame rate and better support for person who's not usually plug the keyboard/mouse on it Therefore I'm prefer to go back to use the deck version so I'm wonder if anyone have any clue what caused the issue and how to solve this. Thank you.