sidephone turning off..

is anyone else going through an issue where your side phone just shuts down after like 10 minutes or so? I thought it was weird when I left it charging last night and the phone turned off. I unplugged it, left it on the side of my table next to my bed and when I woke up this morning it had shut itself down again. maybe I thought because the phone wasn’t in use or something. later that day, I went to the gym with the sundial attachment and was on the treadmill listening to Spotify and the phone after like 3/4 songs in ‘a total of close to 10 minutes’, the phone shut down again. I tried resetting it and didn’t get a fix after that..