DoModalComponent - component variable does not carry through

Oracle documentation says:

Component variables remain defined after a TransferPage, DoModal, or DoModalComponent function. However, variables declared as Component do not remain defined after using the Transfer function, whether you are transferring within the same component or not.

When I try to use a DoModalComponent with a component variable set immediately prior to the call to the modal component, the variable is blank in the target component.

When I switch the scope to Global in both the calling code and the code on the target page, it works.  Has anyone else run into this?

Thanks,

Nick Harvey