Send a fake team as needed for the collision rule

Spigot-Server-Patches/Configurable-Player-Collision.patch

@@ -31,4 +31,22 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
              packetdataserializer.writeByte(this.g);
          }
  
+diff --git a/src/main/java/net/minecraft/server/PlayerList.java b/src/main/java/net/minecraft/server/PlayerList.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/server/PlayerList.java
++++ b/src/main/java/net/minecraft/server/PlayerList.java
+@@ -0,0 +0,0 @@ public abstract class PlayerList {
+     public void sendScoreboard(ScoreboardServer scoreboardserver, EntityPlayer entityplayer) {
+         HashSet hashset = Sets.newHashSet();
+         Iterator iterator = scoreboardserver.getTeams().iterator();
++        
++        // Paper start - Send a fake team to the client to initialize collision rule if no others exist
++        if (!com.destroystokyo.paper.PaperConfig.enablePlayerCollisions && !iterator.hasNext()) {
++            entityplayer.playerConnection.sendPacket(new PacketPlayOutScoreboardTeam(new ScoreboardTeam(scoreboardserver, "collideRule"), 0));
++            return;
++        }
++        // Paper end
+ 
+         while (iterator.hasNext()) {
+             ScoreboardTeam scoreboardteam = (ScoreboardTeam) iterator.next();
 --