Several of the examples for lab observation have the following:
 
{{ <appliesTo>}}

{{ <coding>}}

{{ <system[value|http://hl7.org/fhir/R4/datatypes.html#uri]="http://terminology.hl7.org/CodeSystem/referencerange-meaning"/><code value="normal"/><display value="Normal Range"/></coding>}}

{{ <text value="Normal Range"/>}}

{{ </appliesTo>}}

{{}}

The applies to refers to a different system than specified for "appliesTo".  I think the "appliesTo" was intented to be "Type", i.e.

<type>

{{ <coding>}}

{{ <system[value|http://hl7.org/fhir/R4/datatypes.html#uri]="http://terminology.hl7.org/CodeSystem/referencerange-meaning"/><code value="normal"/><display value="Normal Range"/></coding>}}

{{ <text value="Normal Range"/>}}

{{ </type>}}

This appears in several examples - I noted creatinine, sodium and potassium

{{}}