There are some cases, in which deprecated warnings are expected but are missing.

First mini case:
Method reference of void method:
class A {
    @Deprecated
    public static int foo(){ return 1;}

    public void run(){
        Func b = A::foo;
    }
}
@FunctionalInterface
interface Func{
    int meth();
}

Second mini case:
Method reference of constructor:
class A {
    
    public void run(){
        Func b = Deprec::new;
    }
}
@FunctionalInterface
interface Func{
    Deprec meth();
}

class Deprec {
    @Deprecated
    public Deprec(){}
}

First case works only if method foo() and run() are in the same class,
but second works only if constructor and run() are from different classes.