Already reported using the ingame tool.. but just in case...

-Giant Bat mod "Drink Blood deals X damage over 12 seconds, and 50% of the damage becomes health for you" put a DOT on the player instead of the mob. So basically you get a buff that heals you X and another that dmg you Y.

-When i close the game using ALT+F4 instead of just loging out and close the client, the game closes, but the process is still on memory and can't be launch again unless you kill it via task admin.