** Found 1 unconnected pads **
ErrType(2): Unconnected items
@(105.100 mm, 88.600 mm): Track 0.250 mm [GND] on F.Cu, length: 1.400 mm
@(104.550 mm, 88.050 mm): Track 0.300 mm [GND] on B.Cu, length: 0.050 mm
23 and 25 seem to be connected to GND ok. Perhaps there is a GND connection missing elsewhere and DRC draws the airwire to 23 because it is the nearest pin the HAS a GND connection. Is the green trace connected to GND somewhere? Without the board it is hard to say, what’s going on.
KiCad can be a bit confusing with unconnected items.
If A is not connected to B, should it then show a message for A or for B?
It shows a message of a track segment not being connected, and there is a track segment of a length of 50um, which is quite small and probably shows up as a circle. (It’s also on the back side, so it’s green).
There also is a thin white “ratsnest” line trailing off to somewhere.
Overlapping copper blends into each other when tracks are filled.
Experiment a bit with the icons shown below (in the toolbar on the left side)
These icons determine whether tracks, zones, pads & via’s are drawn solid, or as outlines.
Thank you @paulvdh, when I used the outline view and stripped away a few layers, I discovered a tiled pattern in the ground pad of the LFCSP. This’ll require some experimentation, including, perhaps, editing the footprint, but I am confident the end is in sight.
In short, an unconnected items list may not specify the problem, but it’ll bring you to the neighborhood.