I'm trying to place some 100W wire wound resistors on my board and I'm going to be using my ground plane and some vias as my heat sink. I have a polygon labelled "GND" on both sides enclosed by a stop mask so the copper will be exposed. There is also a GND polygon filling the entire board on both sides, not just near the resistors.
Most of my vias connected to the ground plane without issue but a bunch of them won't connect and I'm unsure why. You can see the airwires in the screenshot below.
I've seen a few other people have issues getting things to connect to the ground plane but the solution usually had something to do with a specific package.
All of these vias are right next to each other on top of the ground plane with no traces between so I'm not sure why only a few won't connect.