When large amounts of cannon shells/missiles are in the air, the projectile thread seems to seize up, all cannons and missiles stop moving and no new projectiles are fired.
Physically, only a few projectiles are still moving. Missiles can be shot down visually while frozen, but their presence to anti-missile turrets does not disappear which suggests that they are still physically present.
This does not affect beams.
Fire off many outputs of cannon or missile repeatedly.
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