BUG: Never ending battles on Strategy map

[mailor]

I have observed some strange behaviour of armies on the strategy map:

Some NPC armies engage in a battle with each other, and never stop fighting (I can't join those battles either, because it says: "The battle has already begun, you can't join" or something like that).

The problem is, some of those battles never end! I have already 4 of those battles going on in my campaign, and I waited several game days for them to stop, but they don't.

Anyone else experiencing this?

PS: Is there a way to officially report bugs to the devs somewhere?

PPS: I love this game!