Hi. Sounds like the timing from feeder to grippers is off, refer to your book for exact degree of the pass off from the grippers. Adjusting them...
I get this problem when doing work' n' tumble, jobs as the colour bar ends up on the gripper edge when backing up so the eye can not see through...
You need to let it cool for like longer before cutting, hot laminate just wrecks guillotine blades.