Strange issue with wallpaper

Hello lesleyfromwaxahachie,

Thank you for reaching out to Apple Support Communities.

Let's change your Lock Screen photo and test to see if the issue persists:

"Create a custom Lock Screen

1. Touch and hold the Lock Screen until the Customize button appears at the bottom of the screen.
2. If the Customize button doesn’t appear, touch and hold the Lock Screen again, then enter your passcode.
3. Tap  at the bottom of the screen.
4. The Lock Screen wallpaper gallery appears.
5. Tap one of the wallpaper options to select it as your Lock Screen.
6. For some wallpaper choices, you can swipe left or right to try different color filters, patterns, and fonts that complement each other.
7. Tap Add, then do one of the following:

• Choose whether to use the wallpaper on both the Lock Screen and Home Screen: Tap Set as Wallpaper Pair.
• Make further changes to the Home Screen: Tap Customize Home Screen. Tap a color to change the wallpaper color, tap  to use a custom photo, or select Blur to blur the wallpaper so the apps stand out."

More details can be found here: Personalize your iPhone Lock Screen

If the issue persists, can you provide a few more details? Does this happen with multiple Lock Screens or just one? Does the issue persist after changing your Lock Screen photo? Also, what is your exact iOS version?

Cheers!

I just recently updated my software on my iPhone 11 and my Lock Screen switches to black. For example it just did this overnight. When I went to bed it was my normal Lock Screen but when I woke up it was black. I have to power my phone off to get it to come back on.