Is a right confusing PitA.
Yesterday I had a message telling me that there was a software update available for the onboard Nyon computer to my e-bike. After a lot of faff I downloaded it, and then had to download the maps all over again (a later version, dated Oct 21). Since then, it appears that some rides have disappeared. The odometer on the Nyon reckons I've covered 1753 km. The app claims 1703.
Today's rides appear on the list, but there was a ride last night that seems to have been lost in the ether. That was after I updated the OS and maps, and consisted of about 10k. I'm assuming, possibly incorrectly, that at some point the computer and the iphone app will start to agree again.
