The Tank seems to get stuck in one of the rooms in map 5. It's the room with a structure in the middle you can go up and has two square openings in the ceiling. I have an mod that plays a warning sound whenever a Tank spawns. The sound played while I was fighting off the horde waiting for the shutter to open, but the Tank never came.

When playing the first 3 times around everything worked fine but after playing a forth time it crashed my computer. Not just L4D2 But my entire computer. it's always in the 3rd part of the map. I've check my computer but it's able to handle stronger stuff then this. Any idea? I haven't changed any of the mods I used for my first few times around.