BaseCommand should only fulfill tab complete of its own scope

core/src/main/java/co/aikar/commands/BaseCommand.java

@@ -643,6 +643,9 @@ public abstract class BaseCommand {
             final List<String> cmds = new ArrayList<>();
             if (search != null) {
                 for (RegisteredCommand<?> command : search.commands) {
+                    if (command.scope != this) {
+                        continue;
+                    }
                     cmds.addAll(completeCommand(issuer, command, search.args, commandLabel, isAsync));
                 }
             }