Must admit i'm pretty annoyed such obvious bugs weren't caught.. but anyway.. the following have occured since the latest update:
Building a caravan and then cancelling that caravan still consumes the caravan limit value.
Non-sovereigns casting spells in combat have their mana reduced to zero at the end of combat regardless of how many spells they cast
Soveriegns which imbue champion with all their remaining essence may not obtain the essence stat from level up and therefore never imbue any other champions, since non-soveriegns cannot cast the spell.