This has happened twice now. Since the latest 'ground support' update we have been hosting a multiplayer game, and after running for some time, a bug seems to have occurred that deletes all the enemy AI.
The game started as normal, then suddenly for no reason all enemy bases were completely empty. Friendly AI was not affected. This was on a dedicated server, not the newer ingame hosting option. As we run private games, mainly PvE with a low player count, the server is often running games for days at a time.
Not sure how to reproduce, as it seems random.