Wow. So sorry the second batch failed Primrose
Primrose, your setup and bags look fine from the photo's, and the oils & fats in the recipe don't look like they could have triggered this.
So the only things that I think it could be is the batch overheated (as BattleGnome suggested). It could be the fragrance doesn't work in HP (this process is designed to have essential oils added after the cook, so maybe it could be added at the end as well?), or the goats milk (maybe it needs a lower temperature?).
If you were interested in finding the cause, it is possible, but it would require 3 small test bags:
1/ Water and fragrance (to check if the fragrance is a problem)
2/ Goats milk and no fragrance (to check if the milk is the cause)
3/ Water and no fragrance (to rule out every other part of your method and ingredients)
Test 1 and 3 could be made from the same batch (with only one having fragrance added)
I can try a milk test (I don't think anyone has used this method with milk before yourself?) if you like?
I don't have any goat's milk, so I could try and make it as close as I can with cow's milk by using some yogurt whey to imitate the extra whey proteins in goats milk and see if I can get mine to do the same thing.
Let me know the superfat and lye concentration, if you would like me to do this (I've got a couple of other tests to run, so it's no trouble
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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*edited to put formatting back to how I typed it originally