That’s interesting. This seems to return only one of the labels, not the others which I know are present (and the network has been trained). What could cause this?
I’m uploading an example of what I mean,

In this picture (it is a human-readable mask) I’m only getting the green region (class 7) but not the other two regions (class 2 and class 3).
This is trained with the latest samples above, and with a pixel-wise accuracy of 99%.