Warning if @MonotonicNonNull apply to static fields

[Ao-senXiong]

As the manual writes:

Use of @MonotonicNonNull on a static field is a code smell: it may indicate poor design. You should consider whether it is possible to make the field a member field that is set in the constructor.

However, the following code does not rise an warning:

import org.checkerframework.checker.nullness.qual.*;

public class Test {
    static @MonotonicNonNull  Object obj;
}