Help on my Polar View shape please

Hello,

I've been puzzled by the Polar View shape from my Wattbike Atom.

As a test I just rode a steady 3 minutes at consistent low power so I could be controlled and consistent on my pedal strokes.



Don't understand the two small but significant peaks at 12 O'clock and more so at 6 O'clock, they are there on pretty much every revolution.

Anybody got any views on this please?

I've emailed Wattbike customer support as I'm concerned there is a problem with the Atom, however nothing back so far.

thanks
David