Was set to “when tracing tracks”, that’s fine.
And then the pad is on the other (bottom) side. The item in the middle of the pad is a via.
The pad itself has no drill hole, smd pad only. It is a component, however, complete with symbol and all.
I come to think it is the same story as was discussed in another thread dealing with stichting zones.
No. Would be an unneccessary zero length (and hence impossible) track from the center of the via to the center of the pad, which are the same coordinates.
DRC does not complain about anything being unconnected.
I’ll leave it there. It is only one instance on the board, I just wanted to understand.
maybe a floating point error again?
You could test it by moving the via (a bit) to one side and connect it using a short trace. If it is still removed this was not the cause otherwise we know a bit more about the bug.
(It could also be that the cleanup tool only checks traces overlapping pads not vias overlapping pads. either way it would be a bug.)
Sure. Moved the pad, then there was a ratsnest line (expected behaviour). Connected it with a track -> peace in the kingdom :-), works as expected. No unconnected nets, no deletion.