1. Attachment flut_1a.png is the capture file, Wrong screen colors but no 'color fringing artifact' is visible when zoomed in.
What color is your battery icon?
Two text lines for CHO and CH1 at the top of your PNG match my PNG...
I'm starting to believe that until I am able to upgrade to the same firmware
version as you that correlation between your results and mine may not be
possible.
Guess what? I had been using only 2 traces.
When I add the other 2, THOSE PNG TRACE COLORS DO NOT MATCH THE DISPLAY
Magenta traces on nanoVNA display is green in PNG, which is opposite color..
Perhaps nanoVNA display has some unintuitive color matching;
LCD colors are fundamentally subtractive while RGB is additive.
There are only 6 unique combinations for converting RGB565 to RGB888,
and the one you have comes closest on my nanoVNA.
The battery icon on my nanoVNA is red-orange; what color is yours?
Oristo