Unknown/Not-mine image on iOS lock-screen
Had my iPhone 12 Pro for years and lock-screen image has been same for a year or so.
Few hours ago I grabbed my phone and an unknown image with 3D letters saying YELLE appeared on my lock-screen; iOS 17.1.2.
I held the lock-screen to customize and the lock-screens customisation mode showed my normal image in the selected position plus a few others I used earlier to the right.
When I tapped my normal image to exit the customisation mode, the foreign YELLE image appeared again.
I tried choosing another lock-screen I used earlier (swipe and tap), but this too resulted in showing YELLE.
Rebooted the phone and things went back to normal.
WTF could this be???
iPhone 12 Pro