Composite search parameters that contains reference type is not working

[Berkant Karduman]

Describe the bug
If you create a composite search parameter that contains reference type, it is not working.

Environment
Which version of LinuxForHealth FHIR Server?
5.0.0

To Reproduce
Steps to reproduce the behavior:

1. Create a composite search parameter for example
   "expression": "Communication",
   "code": "recipient-myextension",
   "component": [
   {
   "definition": "http://hl7.org/fhir/SearchParameter/Communication-recipient",
   "expression": "recipient"
   },
   {
   "definition": "http://example.com/SearchParametr",
   "expression": "extension.where(url='https://example.com/extension').value"
   }
   ]
2. Create a resource (In this example Communication resource)
3. Try to search with the newly created composite search parameter.
   GET HTTPS://baseUrl/Communication?recipient-myextension=Practitioner/Example$false
   Expected behavior
   Search should return the resource.