Ah. This game was played with a fairly old engine - there was a bug that caused the location of a collision to be reported in the wrong place, it’s fixed in the current engine.
What happens is that your ship 6 passes over an enemy factory at the same time as a spawn, causing a collision, but the old engine would put the collision in the wrong place (over your own factory). The viewer therefore thinks the dropped halite should go to you, sees that it goes to the other player instead, and notes the discrepancy.
This will not occur with the current engine.