Im at the same thought process as you so far. After the first clutch hatched I took the ambient down to 88. The second clutch hatched only a week later though and the damage was already done.
like you said, I think the eggs must be getting hotter than my ambient, it’s the only thing I can think of.
as of right now I plan to keep the females and hopefully they can breed like normal so it’s not a total loss.
The males are a waiting game. I have them on wet paper towels waiting for their first shed. They are a little over a week old and so far no improvement so euthanasia is starting to become more of a real possibility. I am extremely disappointed and I’m really hoping I can keep them alive even if they will be ‘pet only’
The odds say that you are probably right. I hope the temp change fixes the issue and that the tail growth issue is temporary (i don't think it is, but it is worth waiting a couple weeks before you put them down).