spinning wheel blackscreen

Here is an article that may help.

• If your iOS or iPadOS device restarts or displays the Apple logo or a spinning gear unexpectedly - Apple Support

esila18 Said:

"spinning wheel blackscreen: my ipad keeps on getting a spinning wheel blackscreen and sends me to the lockscreen right after and before i can do anything it gets a spinning wheel again. this went on for MINUTES"

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Sounds like it was stuck in a boot loop.

Fixing a Boot Loop:

Use my User Tip: How to Fix an iPhone in a Boot Loop - User Tip