Thanks for your feedback, this is really helpful.
I am using matt film for my prints but to cure it, i use my heat press. I leave it on the heat press, few cm without touching the print for 2 minutes at 160C.
what do you recommend in terms of curing as sometimes with my process i get tiny bubbles but they are not very visible?
This makes sense, you can see it’s in the ink layer. I will also agree this is probably your issue. While that’s a bit hot for 50/50, it would be across the entire design and faded looking. Probably a hot spot in curing.
It's hard to see exactly in the photos, but I remember when I overcured/cured too fast with the gloss film, there would be holes in the final print on the shirt. I think that's what I'm seeing here? Happens with matte film too but not as much.