src/java.base/share/classes/javax/security/auth/Subject.java

@@ -298,11 +298,11 @@
       *      not installed or the current subject is set to {@code null}.
       * @see #callAs(Subject, Callable)
       * @since 18
       */
      public static Subject current() {
-         return SCOPED_SUBJECT.orElse(null);
+         return SCOPED_SUBJECT.isBound() ? SCOPED_SUBJECT.get() : null;
      }
  
      /**
       * Executes a {@code Callable} with {@code subject} as the
       * current subject.