earyahmad Said:
"Wallpaper keep changing: I’m using Iphone 13 Pro Max and I’ve set several time my current wallpaper within my choiced.Within few times unlocked the phone, i noticed it change back to other wallpaper which is default from apple.Why this happen again and again?"
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Troubleshooting Changing Wallpaper:
Caches seem to be the culprit here.
Caches remember changes, and ridding of them may trash this loop. So, to trash them, red of "System Data"/"Other". Use my User Tip: Clear Other storage on your iPhone or iPad - Apple Support