Polygons disappear on 'refill' in Gerber plotting

[Rene_Poschl]

@moritz

I nearly had this go through manufacture, as the manufacturer re-plotted my design when panelling and just by chance I caught this in time.

The danger of sending anything but gerber. I would guess the problem was that your manufacturer had a different clearance setting somewhere.

@moritz

this seems to be something to do with the requirement to have a track with a bend inside a polygon, otherwise it’s not considered a valid polygon?

The polygon must be connected to a pad in some way and kicad checks traces only at endpoints of segments. See How to create a power plane (using zones)