Hi Robbin,i have had this same issue before..it can be one of several things..is your is your flash dryer wide enough for for the under base..? looks like that spot was not dried so under base was still wet. if it's still wet / tacky it will stick to you next screen and lift. and if that is not the issue did you clear your under base screen if you did not clear all the ink with each stroke you will have dry spots. Or it could be that you have dried ink clumps in your white and when you printed they got pushed into the mesh and clogged your print area.