Agree weather has nothingto do with the real problem. I have been having this problem the last couple weeks with my '21 PW. Of course it didn't happen when I took it to the dealership. Taking it back on Tuesday and having them do a full sweep of the sensors & back up camera wiring. It started for me immediately after my rear camera stopped working, but that only lasted one day and magically started working again.
It happens right after putting it in gear, after starting, almost every time. It also happens almost every time I brake hard. It happened once when I had to unexpectedly stop quick so I tried repeating the situation and found it happens 75% of the time when braking hard.
I am hoping the sweep of the wiring will find the issue; if not the dealership will get tired of seeing my grumpy face!