My most recent project has a three pins with wires going to them, leaving them unconnected. They visually look like any other connected pin. I can only see they're unconnected by moving the wire or the part. They also show up as unconnected when I export a netlist. There are three (3) of them in my design. Two (2) of them show up in a ERC report in the schematic. The last one I have no way to detect unless I move the part and notice one of the wires doesn't move.
The length of these wires appears right. If it's an off-grid issue, it's off by less than any bodily appendage on a bee.
Has anyone else experienced this? Is there any way to detect it in the case where it does not show up as an unnconnected pin in the ERC report?