If i have a facet A with an Optional CU, then I include Facet A in Facet B and change the optional CU to mandatory, it works as expected. but If i know include Facet B in Facet C, the CU is optimal again. Once something is mandatory it needs to always be mandatory if it is include upwards. This also applies if two facets have the same CU where one is optional the other mandatory - if a profile include both then the profile needs to show it as mandatory.