Allegiance Point costs fluctuating

[Sneakimus]

I've noticed that the Allegiance point cost for allied units seem to vary, despite the fact that the recruiting army has remained in friendly territory.

Is this intended? I know there's supposed to be different costs depending on whether you're in friendly territory or not, but there seems to be more variables that routinely change the allegiance point costs for allied units. I have not heard of any other variables.

For instance, recruiting in my province, I've noticed that Ironbreakers from Clan Angrund seem to fluctuate between 30 and 38 allegiance points cost, whereas Greatsword infantry from the Cult of Sigmar remain at 11 and never changes. This is from the same recruiting lord, staying in friendly territory, and I've never bought any allied units from either of them, only from Citadel of Dusk and Cult of Sotek.

[Sneakimus]

Does anyone know what causes these changes?

[Sire of Suns]

Closing in a year later and I've also encountered this issue many times and have yet to find the reason or a fix. I've also found that sometimes the cost discount from having a tier 3 outpost works, and sometimes it doesn't. Usually when it goes from "does" to "doesn't", it gets stuck on "doesn't", so recruiting anything from allies becomes very expensive and almost not worth it.

[Spododo]

In MP I just noticed that my allies troops were reduced ~50% after we declared war together on a common target (and then conquered a settlement together right away). So I would guess it's somehow related to being at war together and/or honoring the alliance.
Edit: After ending the war, the cost went right back up