iPhone XR Keeps Randomly Shutting On and Off

Hello everyone,

Last year, I believe around May, I purchased an iPhone XR. It has been working terrific -- up until last night. I had my phone connected to a speaker playing music by our pool and randomly the music stopped playing. I went over and checked it out and I realized my phone had shut off and it was in the process of powering back on. I was a little concerned as I had 50% battery so I went and grabbed a charger and plugged it in, started the music, and got back in the pool. However, less than a minute later, the same thing occurred.

Since then, my phone has continually been turning itself on and off again whenever I attempt to get on it. Sometimes it lasts a couple minutes until it powers off and comes back on, and sometimes it only lasts a few seconds. Nothing on the phone itself looks damaged, and I can't think of anything that would have caused it to act like this. My phone has been rendered useless because of this.

Anyone know of a solution to fix the problem? I've tried manually powering it off and it just keeps turning on and off when I started it back up. I also let it charged overnight, and still it did not fix the problem. Insight and help is greatly appreciated!

Caleb