Possible incompatibility with Polymer

[kosma]

Modloader

Fabric

Minecraft Version

1.20.1

Modloader Version

0.14.21

No Chat Reports Version

NoChatReports-FABRIC-1.20-v2.2.0.jar

Modpack Info

No response

The latest.log File

No response

Bug Description

As discussed in Discord, I have found a potential incompatibility with Polymer when connecting with a vanilla client. The server says:

[02:48:37] [Netty Epoll Server IO #1/ERROR]: Received class net.minecraft.network.packet.c2s.play.PlayerSessionC2SPacket that couldn't be processed
java.lang.ClassCastException: class eu.pb4.polymer.networking.impl.PolymerHandshakeHandlerImplLogin cannot be cast to class net.minecraft.server.network.ServerPlayNetworkHandler (eu.pb4.p
olymer.networking.impl.PolymerHandshakeHandlerImplLogin and net.minecraft.server.network.ServerPlayNetworkHandler are in unnamed module of loader net.fabricmc.loader.impl.launch.knot.Knot
ClassLoader @3c09711b)
        at net.minecraft.network.packet.c2s.play.PlayerSessionC2SPacket.handler$bkl000$nochatreports$onHandle(PlayerSessionC2SPacket.java:525) ~[server-intermediary.jar:?]
        at net.minecraft.network.packet.c2s.play.PlayerSessionC2SPacket.apply(PlayerSessionC2SPacket.java) ~[server-intermediary.jar:?]
        at net.minecraft.network.packet.c2s.play.PlayerSessionC2SPacket.apply(PlayerSessionC2SPacket.java:7) ~[server-intermediary.jar:?]
        at net.minecraft.network.ClientConnection.handlePacket(ClientConnection.java:175) ~[server-intermediary.jar:?]
        at net.minecraft.network.ClientConnection.channelRead0(ClientConnection.java:160) ~[server-intermediary.jar:?]
        at net.minecraft.network.ClientConnection.channelRead0(ClientConnection.java:52) ~[server-intermediary.jar:?]

Steps to Reproduce

No response

Other Information

No response

[elhertz]

Bumping this as I can't find an alternative for polymer and ncr

[ThatBlockyPenguin]

Bump again, just encountered this myself