it says it improves morale after one turn ... but how, dug in one stood next to one, the clan stayed angry. How does it work?

Theres also a bug with Slavs once suplie is exhausted theres no way to restock, encamping doesnt help, stays exhausted.
Basicly i have a Slav warrior out of supply totally angry right next to an ancient shrine whos ... useless, and it was such a badass warrior :(