src/de/steamwar/lobby/listener/DoubleJumpListener.java

@@ -19,6 +19,7 @@
 
 package de.steamwar.lobby.listener;
 
+import de.steamwar.lobby.utils.LobbyPlayer;
 import org.bukkit.GameMode;
 import org.bukkit.Material;
 import org.bukkit.Sound;
@@ -47,6 +48,9 @@ public class DoubleJumpListener implements Listener {
         if (player.getGameMode() != GameMode.ADVENTURE && player.getGameMode() != GameMode.SURVIVAL) {
             return;
         }
+        if (LobbyPlayer.getLobbyPlayer(player).isFly()) {
+            return;
+        }
 
         event.setCancelled(true);
         player.setAllowFlight(false);