2017 Radwagon clunk when starting off

[bsharp316]

I have a 2017 radwagon and I recently began feeling a clunk as the rear motor engaged once I started pedaling. The rear axle nuts are tight, but when I squeeze the rear brake and lock the disc, I can still rock the bike back and forth about an inch on the pavement. So I assume that the rear hub motor is loose and not secure to the drive axle and rear brake assembly. Has anyone else experienced this issue and determined what the problem was and fixed it if necessary? THANKS. bsharp

[Jman]

I have noticed a clunk from the motor on my Rad Mini step Thru.  Not sure what causes it but it happens even without pedaling.