Looks under-cured to me. Is the ink still soft on your finished prints? If you pick at it, does it come up?
Run some freshly printed shirts through your normal settings, let them cool down, and give them the old-fashioned "stretch test"- take an area of the print and stretch it between your hands. If the print cracks and flakes apart; the curing temp/time settings need some adjusting. If it flexes and stretches with the fabric; you're good to go.
Do you have a laser temp gun? If not, you should invest in one. They can really help dial in your settings.