[BUG] Occasionally faulty AI characters stand at spawn point and do nothing

Occasionally AI-controlled characters will stand and do nothing at the spawn point; once they enter this state, only the rook will occasionally throw a boulder or equivalent at armies or demigods that get within range.

I have only seen this occur on my team (although that may be because of the fog of war), and once it happens it occurs for the rest of the game whether or not those bugging demigods die.

I cannot reliably reproduce the bug.