HR drops during OL rides

Has anybody else had issues with their HRM readings dropping to zero during an On Location ride on a Windows PC? On the last few OL rides, I’ve had issues with my HRM readings dropping to zero within the SYSTM Windows PC app (Ant+) while still reading fine on my bike computer (Ant+) and on the iPhone app (BLE). I haven’t had this issue with any of The Sufferfest workouts. It only seems to be an issue with the On Location rides.