A Client cannot join a Server after setting a GameMode in the OpenLevel node's Options string

A Client cannot join a Server after setting a GameMode in the OpenLevel node's Options string.

Reproduced in 4.9.2 binary, 4.10.0 binary, and Main (CL# 2776829)

1. Open the Multiplayer Shootout project
2. Open the MyGameInstance blueprint
3. In the Open Level node (in HostGameEvent), change the Options input string to "listen&game=/Game/Blueprints/MyGameMode.MyGameMode_C"
4. Package the game for Development > Win64
5. Open an instance of the packaged game
6. Click Play to run as a listen server
7. Open a second instance of the game
8. Click Find Games
9. Click the found session to join

Result:
The client cannot connect to the server

[UE-23848] Bug Status

Fix UE-51650

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