ImmunizationRecommendation in ActivityDefinition doesn't produce output in $apply

[lukeaduncan]

I'm using the attached ActivityDefinition/IMMZ.DT.01.BCG.01.json with PlanDefinition/IMMZ.DT.01.BCG.json. When I access $apply on the PlanDefinition the ImmunizationRecommendation resource is blank.

IMMZ.DT.01.BCG.01.txt
IMMZ.DT.01.BCG.txt

This is the output from the latest cqf-ruler docker image:

{
"resourceType": "CarePlan",
"contained": [ {
"resourceType": "RequestGroup",
"id": "bfca898b-b255-4ed2-a45c-00d6bbd78aa7",
"status": "draft",
"intent": "proposal",
"action": [ {
"resource": {
"reference": "#b91bd12b-bbe3-4603-9f4c-f29d7c936f61"
}
} ]
}, {
"resourceType": "ImmunizationRecommendation",
"id": "b91bd12b-bbe3-4603-9f4c-f29d7c936f61"
} ],
"status": "draft",
"activity": [ {
"reference": {
"reference": "#bfca898b-b255-4ed2-a45c-00d6bbd78aa7"
}
} ]
}

These are the test files I'm using for testing:
tests-Observation-bundle.txt
tests-Patient-bundle.txt

[lukeaduncan]

The Library files can be found here: https://github.com/WorldHealthOrganization/smart-immunizations/tree/main/input/resources/library