This was something I have never even heard about, so I figure I would share my experience. First two things to note with this:
first we are dealing with the spider gene, which we know has oddities.
Second, I have been experimenting with my incubator and have made modification that last year were giving me day 50 hatches and also appeared to give me a very male heavy ratio (80+%). I changed some things this year and this is my first clutch, which hatched on day 48. The ratio of this clutch appears to be 50/50. I have 9 more egg in there, if nothing suggests a skewed sex ratio, I guess odds just fell that way last year and I see no positives to the early hatches and will be making changes to lengthen it again.

I bred a Lemonblast het Hypo to a Spider. She laid 4 good eggs and a slug iirc. Let them cook, we are checking on them daily for the past few days, day 47 no pips. day 48, 2 are already out of the egg, spinnerblast and a spider, 2 have their heads out, 2x spinnerblast. We never cut the eggs. So we hit 4 for 4 on the spider gene. The oddity in this is the spinnerblast already out of the egg. I see he is breathing, but acts dead, limp as can be, but then makes movements 2 or 3 times, like moving his head away from me and once even moving a few inches in the incubator. He has a huge yolk still, so I let him be. The spider is acting like a normal ball python.

The next day (this morning), he has absorbed his yolk and is still breathing, but still limp as can be, still in the exact same position as last night, he never moved the entire night. If he wasn't breathing I would think he dead. One spinnerblast came out of the egg and is fine. I come home from work and find the little guy has stopped breathing and passed. Other spinnerblast has came out of the egg and is fine.

So I have never heard of a snake basically be dead but not. It hatched itself and could of very well been the first one out, but then something made it go downhill from there. I'm not sure if the early hatch had anything to do with it and I am not sure if the spider gene had anything to do with it. The other 3 are doing great. looks like I have 1.1 spinner blast pos het hypo and 0.1 spider pos het hypo. The one that passed was a male.

So if this is a fluke, I guess it could be the early hatch (even though the other 3 are fine). If people have experienced the same with spiders, might be worth noting, or if other have experienced this with non-spiders, I guess it just happens sometimes and I have never heard about it. It's not pleasant to see, so I could see people not talking about it.

but here are the little ones that are doing great: