Unreal Engine - non-ascii characters in annotations breaks websocket.

[tvandijck]

What happened:

We have an annotation that looks like this:

(agones.dev/sdk-embark.squad-layout, {"maxSquads":4,"maxSquadSize":3,"allowDuplicatePlayers":true,"squadInfo":[{"playerInfo":[{"playerId":"EMBARK:8288227634772895990","playerName":"tvändijck"}],"squadSize":3}],"maxPlayers":12})

Note the playerName field has an 'ä' in it.

When calling WatchGameServer this data never arrives. HandleWatchMessage fails to correctly parse the received data, and silently ignores it without ever logging an error.

What you expected to happen:
We expect that when we call WatchGameServer we get FGameServerResponse's with those annotations.

How to reproduce it (as minimally and precisely as possible):
Put any non-standard ascii character in any json field of annotations or metadata.