this probably needs to be handled anyway

ignoreCancelled seems to introduce the issue of completions not being filtered in some cases, and it shouldn't cause problems by running anyway

src/main/java/eu/endermite/commandwhitelist/spigot/listeners/PlayerCommandSendListener.java

@@ -8,7 +8,7 @@
 import java.util.*;
 
 public class PlayerCommandSendListener implements Listener {
-    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    @EventHandler(priority = EventPriority.HIGHEST)
     public void PlayerCommandSendEvent(org.bukkit.event.player.PlayerCommandSendEvent event) {
         Player player = event.getPlayer();
         if (player.hasPermission("commandwhitelist.bypass"))