Still haven't got an exact lock on it, but experimentation has revealed that it's related to using the named rolls feature (i.e {roll="advantage"}) It may be a character limit on the titles in a single post or similar, but basically if you're doing 5 or more rolls, don't use titles. Just write them out in the post.Thaliss' rolls IC didn't work for some reason. I'll try them here:
lol...before I start flinging spells around too much, I should probably make sure I have hit points for this. Spending hit dice during our short rest: [roll0] adding Con bonus of course... Aridha was down to I think...2 HP? I'll doublecheck. She may have had to throw a heal on herself, but it'll be okay. She had ample 1st level slots left. And I was wrong about her 2nd level ones...she has one left. So!