I have done this 3 times now. My complaint isn't about difficulty peeling, it's about the eggshell cracking while they're cooking. The last time, 7 out of 10 cracked, and 2 of them cracked early enough in the cooking to burst out of the shell.
Someone told me to try the lower pressure setting...
Twice I have made them in my Instant Pot:
1 cup water in the pot
10 eggs (Using the trivet!)
5 minutes high pressure. Wait 5 minutes and release the rest of the pressure. Lift out the trivet and put the eggs in a dish of cold water.
Both times, the eggs peel well. These are fresh off the...
The only other thing I can suggest is cooking them in a pressure cooker, like an Instant Pot, if you have one.
https://www.simplyrecipes.com/recipes/easy_peel_hard_boiled_eggs_in_the_pressure_cooker/
@U_Stormcrow, does this have anything to do with threonine levels?