Resting heart rate issues

Anyone else having issues with the accuracy of the heart rate graph since upgrading from 4.21? I know this has always been a little patchy but was always ball park.

I went to bed with my average resting heart rate for Friday at 43bpm but by the morning this had changed to 60bpm (Friday). A look at the heart rate graph didn't show any spikes or high readings during my sleep...

When I look at my lowest average RHR today, the reading on Connect for Friday showed 56bpm, even though during that day it was showing as much lower?