Player can try to join after game started

[aco4]

I hosted a 5v5 game, and put 1 bot on the other team. (So it was 1v1 with open slots.) While "Port mapping creation is in progress...", I started the game. About 30 seconds in, someone tried to join. A sync error occurred. They were unable to join, and left. I was able to continue playing normally

NTW_5v5Full_RQ
No Scavengers
Locked Teams, No Shared Research
High Power Levels
Start with Advanced Bases

[05:09] Purple-BoneCrusher! (private to arc): from Purple: gl ;)

Port mapping opened external port: 2100
Your external IP is: 173.73.235.148
Server message:
Welcome to Warzone 2100!
Your game is now hosted on the lobby server.

Kapten Didi joined the game
Kapten Didi left the game

• OS: Windows 11
• Game version: 4.5.5