appease checkstyle, move back to older fix placement

proxy/src/main/java/com/velocitypowered/proxy/connection/backend/BackendPlaySessionHandler.java

@@ -18,7 +18,6 @@
 package com.velocitypowered.proxy.connection.backend;
 
 import static com.velocitypowered.proxy.connection.backend.BungeeCordMessageResponder.getBungeeCordChannel;
-import static com.velocitypowered.proxy.protocol.util.PluginMessageUtil.constructChannelsPacket;
 
 import com.google.common.base.Preconditions;
 import com.google.common.collect.ImmutableList;
@@ -62,8 +61,6 @@ import io.netty.buffer.ByteBufUtil;
 import io.netty.buffer.Unpooled;
 import io.netty.channel.Channel;
 import io.netty.handler.timeout.ReadTimeoutException;
-
-import java.util.Collection;
 import java.util.regex.Pattern;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
@@ -115,13 +112,6 @@ public class BackendPlaySessionHandler implements MinecraftSessionHandler {
       ));
     }
 
-    Collection<String> channels =
-            server.getChannelRegistrar().getChannelsForProtocol(serverConn.getPlayer().getProtocolVersion());
-    if (!channels.isEmpty()) {
-      PluginMessage register = constructChannelsPacket(serverConn.getPlayer().getProtocolVersion(), channels);
-      serverMc.write(register);
-    }
-
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/connection/client/ClientPlaySessionHandler.java

@@ -535,6 +535,14 @@ public class ClientPlaySessionHandler implements MinecraftSessionHandler {
     }
     serverBossBars.clear();
 
+    // Tell the server about the proxy's plugin message channels.
+    ProtocolVersion serverVersion = serverMc.getProtocolVersion();
+    final Collection<String> channels = server.getChannelRegistrar()
+            .getChannelsForProtocol(serverMc.getProtocolVersion());
+    if (!channels.isEmpty()) {
+      serverMc.delayedWrite(constructChannelsPacket(serverVersion, channels));
+    }
+
     // If we had plugin messages queued during login/FML handshake, send them now.
     PluginMessage pm;
     while ((pm = loginPluginMessages.poll()) != null) {