ClassCastException during snomed CodeSystem $lookup with RemoteTerminology server as Snowstorm Terminology Server

[centaurusgod]

Issue probably linked to: #5699

Performing CodeSystem $lookup on remote terminology server set as https://tx.fhir.org/r4/ is fine but using snowstorm as terminology server results in this error.

curl --request GET \
  --url 'http://localhost:8080/fhir/CodeSystem/$lookup?system=http%3A%2F%2Fsnomed.info%2Fsct&code=134006&_format=json' \
  --header 'Content-Type: application/fhir+json'