If closing down the galley app and re launching does not help then please try clearing it's cache via Settings, Apps, Gallery, Storage, Clear Cache.
If that does not help put the phone in Safe Mode and then see what happens.
> Safe Mode > https://www.samsung.com/uk/support/mobile-devices/how-to-start-my-galaxy-device-in-safe-mode/ turns off downloaded apps and themes etc which may highlight an app or theme that's causing conflict.
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "
