one stray ground fill between signals from JP1 to NGFF1
It seems that between pins 7-8 and 9-10 a ground polygon has flowed between the traces, under pretty much the entire length of the NGFF module. This is not nice as we don't have them between other signals, and there are no ground vias, so basically we have something that is attached only on one side to GND and could potentially become an antenna / passive radiator.
We should either
- remove it, or
- add GND vias and then add dsimilar GND polygons between other signals, too.