The Forest bug is probably know, but I will "repost" here, and make sure you guys noticed.
I have cleared some camps off some forest tiles (which is remarkably NOT show well shown on the map)

These tiles show up as forests properly after a save and a load.

I would suggest also to make lairs show somehow visually that they are part of a forest (like trees on the sides of the lair).

Second part is about River tiles not visually showing a River, but still deducting movement and all that nonsense .

Have no clue why these tiles are rivers anyways, hope it helps

Sincerely
~ Kongdej