Orange Ink Question

Using IJM inks in my P7000 and working great. Suddenly today big shift and traced this down to the orange ink shifting about 7 de in my lin. Any thoughts on why it would shift and what would be going on? All nozzles good. Agitated the ink cart and did a power clean? Any other ideas. Trying to avoid buying the Epson orange…

This will happen if you do not agitate regularly. We do this every week on the color p9000 here at Cone Editions Press.