I had a similar issue that I attributed to the drive system.hey michael,
same issues with my urban plus 2017. btw, i don't even use the COBI system. cool for a week then whatever.
now, i have a prob with the chain skipping when in top gear. it could be the derailer is worn, but it seems that it
is an electrical or motor issue. have you experienced anything like this?? it skips, or bangs, every 20 seconds or so...
A good professional tune-up with a new chain solved it easily.