iPhone 12 going into airplane mode

Twice in the last week or so, I’ve tried to do something on my iPhone 12 and gotten a message saying I didn’t have any internet. I found this weird as I had both apps sent to also run under cellular. Both times I went into setting and airplane mode was turned on. This is super weird as I have never turned on airplane mode on my iPhone 12. This is happening under 1OS 15.3. Anyone have any ideas how this can happen?