I went for a 30 mile ride and at the end my cadence was recorded but power was missing.

So Last Saturday I rode 30 miles, at the start and for most of the ride everything was fine. However towards the end the cadence was being recorded but the power data was missing.

Please see the data from Garmin connect. Has anyone every had this and if so what is the fix. They are new Pedals and software is saying up to date.

I am at a loss.