Start a mission, wait for aliens to show up, then kill one. The games goes back to the world map.

The problem has been introduced in commit 49cb7eb260fe2d50e8c24b485aefbc0585c08799. Stepping in the code, I saw that in G_SendInventory all containers in the inventory of the "floor" entity have id == 0. Therefore using cont->id in ent.getContainer(cont->id) always returns the first container, and not the one that actually contains the items. Looking better at the code, the inventory of the floor is probably never initialized. G_SpawnFloor calls G_Spawn, that in turns get a free Edict from the pool and uses it, but this bypasses the Inventory constructor.