Drawing abnormalities on Forerunner 955 solar

I have a watchface which on the Forerunner 955 Solar, the rendering is significantly different between the watch and the simulator. 

See attached pictures.

Watch:

https://c.gmx.com/@601543519135334994/-CIsEwr1QXG0xeUmk_MM5w

Simulator:

https://c.gmx.com/@601543519135334994/qYRA8mPYRECnPtiMyjj1dQ

On the actual watch the box around the date window is missing, and the subdial circles are choppy.

THe user reports that originally when the watchface was installed, the date box was present, but not any more.

Very strange!!! 

Any thoughts?

I assume that bitmap resources are preprocessed for color and scaled (if required) during compilation, so that on the actual watch the bitmap is just loaded and displayed.  Is this correct?