Goat conquest : volcano, enemy chaman dying on lava land crashes game

Chaman from Rat clan fleeing my army into his territory covered by lava, stops then starts healing.
If the chaman is healing as he's dying, the game freezes, Ram consumed goes up like 1GB/2secs. (killed the process at 22GB used).
This does not happen if the chaman just runs through the lava covered land ha has to be standing still and healing
had that happen twice