not all archetype constraint bindings are being exported in OPTs

I have an archetype with

ELEMENT[at0002.1] matches {
value matches {
DV_CODED_TEXT matches {
defining_code matches {[ac0.1]}
}
}
}

...

constraint_bindings = <
["SNOMED-CT"] = <
items = <
["ac0.1"] = <terminology:SNOMED-CT?subset=diagnosticos>
>
>
["ICD10_1998"] = <
items = <
["ac0.1"] = <terminology:ICD10_1998?subset=diagnosticos>
>
>
>

I the TD the terminology constraint binding is shown on the right panel (ICD10 is not displayed).

When I export the OPT, the OPT has only

<referenceSetUri>terminology:ICD10_1998?subset=diagnosticos</referenceSetUri>

No reference to SNOMED is included.