I have one line in the mission (1414) Hire Trade Escorts that is not working correctly.

Stage 6, Action 1 spawn npc group.. 5 Convoy Warthogs

I have the quantity of npcs to spawn set at 5 which appears to be the default since it is the qty in the selection box when you choose that action off the scroll down menu.

Every time this line only spawns 1 npc instead of 5

All the other stages (2-5) are set up identical and spawn the correct number of npcs with quantities set between 1-4.

Is this a bug or is 4 the max for a spawn npc group action?