Daily average resting HR value wrong since getting pacemaker

Since getting a pacemaker a few days ago something strange seems to be happening. I know HRV will be affected but this is not that.

HR values look very plausible with resting HR around 60 which is what the pacemaker is set to but the daily average RHR figure is down in the low forties, every day since the procedure. Anyone see this before or have a clue what's going on? Averaging is such a simple calculation...