water form roller glaze

hello I was wondering if anyone could give me any insight on why the water form rollers glaze over where the color bar boxes are for each unit. I'm not sure if that is typical or if it's something that can be prevented from happening prematurely because the rest of the roller hasn't shown any signs of glazing. Most runs it's never a problem but when you try to lay down a nice big solid the glazed stripe shows up and there is no getting it to go away. The press is a Hamada b452 using DOP thermal plates. It has happened to Syn-Tac, Pacesetter, and Roller Specialist rollers so I'm not sure if that's just the nature of the beast or not. Thank you!