certain vehicles with multiple weapon systems can get confused of the status of a single weapon system when both are used simoultanously, noticed on the mamoth tank there is a change when holding Down both firebottons for the main cannons to fire a salvo of 3 rounds on a magasine while firering its missiles. when this confusion happens, the mammoth tanks missile launcher "freezes" sometimes it has 1 missile left, in which case you simply just let go of the button and hold it Down Again, but sometimes it empties the magasine, and wont reload until manually told to. the other vehicles have similar problems with varying effects...