RunAsIdentity is not propagated correctly

I have one message driven bean A and two stateless beans B and C.
A annotated with @RunAs, @RunAsPrincipal and @SecurityDomain.
B and C annotated with @SecurityDomain.

A receives message and calls B which calls C.
RunAsIdentity is propagated to B only but not to C.

Why? Is it expected behavior?
I expect propagation of RunAsIdentity to all beans in execution chain after bean with @RunAs* annotations.