What’s wrong with my camera?

Yesterday my iphone camera showed a strange reaction,

the image was waving when I wanted to take a picture of the sky and the scenery.

I don’t know if it was because of the weather, because it was a sunny and hot day, though I wasn’t directing the camera to the sun.

The reaction was caught on live photo,

and it disappeared later on.

I am posting the image that I changed into a Gif file