Cascade misses multiple errors with the same text messages

[amchiclet]

Casade reports only one error for a piece of code such as the following. Perhaps, it uses just the text messages and not their locations to distinguish them.

public class C19 {
    Object c19m1() {
        return null;
    }

    @SuppressWarnings("rawtypes")
    @NonNull
    Object c19m5() {
        return null;
    }
}