Hard to peel

Customer service (had an issue with my art) was great, printing looks great. Stickers are cut too deep, and start to peel paper backing apart, won't release. Gave random samples to kids that are target audience age, they had hart time too. With some work they eventually would come apart, but experience was frustrating for kids. Not my first Sticker Mule order and will probably order again unless the issue persists. Need to add step to quality control to address this before green lighting production on jobs.