`$expand` doesn't expand nested codes

[IceFreez3r]

Blaze doesn't seem to expand a ValueSet with nested codes correctly. I uploaded https://hl7.org/fhir/R4/v3/FamilyMember/vs.html and http://terminology.hl7.org/CodeSystem/v3-RoleCode to my Blaze server, but when I try to expand the ValueSet it only returns the root code FAMMEMB:
http://localhost:8080/fhir/ValueSet/v3-FamilyMember/$expand?_format=json

I compared with https://tx.fhir.org/r4/ValueSet/v3-FamilyMember/$expand?_format=json where all the codes are returned

I also checked that the server has the correct CodeSystem:
http://localhost:8080/fhir/CodeSystem/v3-RoleCode?_format=json

[IceFreez3r]

I was digging into this a bit. I'm not sure if I messed up the last screenshot, because a different CodeSystem with recursive concepts is working. But the relationship in FamilyMemberHistory (or more the used v3-RoleCode CodeSystem) was changed from a nested CodeSystem to one using subsumedBy properties. The latter system is also still in use by v3-RoleCode in the R6 ballot release.

I think the problem is that Blaze doesn't resolve subsumedBy references?