Bedrock players can't switch server with /cmi server [servername]

Hi, I have a small bungee network. Java players can switch to any of them with /cmi server [name]
But I have added a new lobby server and this is where im getting the issue.

Bedrock players are getting: Kicked whilst connecting to lobby: Unable to authenticate - no data was forwarded by the proxy
but they can connect to my other older servers fine. And no, I didnt put geyser on the lobby backend server. still only on the proxy.

backend servers are Purpur
any ideas? Thanks!
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