I didn't see anything in the patch notes, so not sure if this was intentional or a bug introduced from fixing unlawful imperial territory issues from 1.23, but Austria was demanding unlawful imperial territory from me even though I was allied to them and had 200 relations. I was playing as Saxony and Austria sent the demand after every single war. While the relations hit wasn't enough to end our alliance, the constant unrest, prestige, and legitimacy penalties were annoying. This takes away the only real benefit from allying the Emperor as an HRE member who is not on the edge of the empire since you can't call them into internal wars. I guess it prevents them from declaring war on you for the territory, but I would rather just ally Poland or France to discourage Austria from coming after me.