This happened to me when I got my iPhone 13 Pro almost from day one. I spent hours on the phone with customer care, took it to the store…twice…even got a replacement device. The first time I was told that it was a watch pairing issue. Unpaired it, and re-paired it and it worked…for about a week…and then back to the same problem. I did hard resets, restored to factory settings and set up as a new device (which was an AWFUL process and I ended up losing some of my stuff), but the problem still existed. I unpaired and turned my watch COMPLETELY off, didn’t fix it. There were some settings that looked like they could be related to the issue so I turned them off…I also unpaired my iPad and turned it off. Still having the issue.
now for the crazy part….
all of a sudden…and for NO REASON…it just stopped happening. I hadn’t done anything to try and fix it…no updates…nothing. I just wasn’t having the problem…as much. Every once in a while it’ll do it, but RARELY…which is still EXTREMELY annoying and this problem should’ve been fixed by now. $1,100 for a new phone that has THIS VERY BIG ISSUE? Ridiculous. It’s pretty disappointing that Apple hasn’t put any priority into fixing this issue.
my suggestion is to be the squeaky wheel with Apple Support….call every day and let them know you still have the problem. Eventually, there might be a resolution…but I wouldn’t hold my breath at this point.