[Gateway103]

I'm not sure if this is a factor, but perhaps the temperature scales in some of your provinces fluctuated and caused some income loss. Temperature scales are known to fluctuate despite having high dominion, which is why picking Cold 3 for Jotun is a viable strategy despite their preference being Cold 2.

On the other hand, I have this suspicion that season affect income. I have not tested it per say, but I tend to notice higher income during spring/summer then I do in fall/winter time, same goes for supplies. In some way, it makes sense, but in another, it could simply be the effect of temperature scales.

Just a thought.

-Gateway103