Heart rate reading getting stuck on 955

On my last two runs, my heart reading is getting stuck around 150 and not increasing until I take the watch off my wrist, then put it back on.

First run, I was wearing watch only.  Second run, I paired with the HRM pro.

See links below for the data - yellow highlighted is time spent running before taking the watch off my wrist and then putting it back on.  Any ideas?

11-5 run https://ibb.co/LzXwhN3

11-7 run https://ibb.co/MS5tm8Q