We had a lobby with 3 players. It said one player left, but he actually didn't, we could still talk in local chat. Another person (4th) joined, and we started the game. This resulted in 4 characters at the start, but we could only see 3 portraits and inventories. As soon as we talked to the Red Prince, the game corrected itself and we could see the 4th portrait and inventory.

Image for proof / further explanation: http://imgur.com/06Hj6bd


Screenshots gallery of some of my Original Sin 2 Early Access bug reports: https://imgur.com/a/zGzEl