Unknown "keyhole gallery icon" sometimes appears on lock screen? Sometimes on my lock screen, an icon with what looks like a keyhole and some sort of gallery-related image appears for a few seconds and then disappears. It happens randomly when I turn on the screen on my phone. It shows among the other notification icons in the middle of the lock screen, and it always disappears by itself after a few seconds even if I don't unlock the phone.

The phone is a Samsung Galaxy S10.
I can't find any settings or apps that seem related or that have this icon, and I can't find the icon when Googling either.
The mystery is solved - apparently it has something to do with the &quot;dynamic wallpaper&quot; feature.
I'll leave this answer here in case someone else sonders about this icon.