Constant heart rate alerts with no alerts set

On a run with no set workout plan of any kind set, when my heart rate reaches the red zone, my device beeps constantly and doesn't stop until my HR lowers. In the same workout, my HR went back into red but didn't start beeping. 5 min later going up a hill it doesn't stop beeping. I don't have any heart rate alerts set or anything set. I went thru every menu and checked if there was a random alert option and there is no help. Fenix 6x pro solar using HRM pro strap.