The BasICColor software doesn't offer native TRC gamma, although you can specifiy any gamma you like. Could the problem lie in a clash between the gamma 1.8 of my working space and the 2,2 of my calibration?
The difference in TRC between working space and display should not account for this. I’m not sure why you are seeing this effect. You could try 1.8 just for fun to see if this disappears. In such a panel, I can’t understand why you’d see any such banding.