Just had this baby come out of the egg today... and he has the thickest, blackest dorsal stripe

I have another bumblebee from the same male who looks like a traditional bumblebee from a different female, with the thinner lines...

Just wondering if anyone has seen something like this. Mom is a normal with some reduced markings in the side patterns, but otherwise looks "normal" - she came from another breeder:



This is a bumblebee from the same male, different female:




he's gorgeous, and i love it, so he's probably going to be a keeper, but I just thought I'd ask to see if any of you have seen something similar before?