Get Case Instances REST request fails due to multiple resources methods matching the request

There are multiple resource methods matching the requested endpoint "server/containers/

/cases/instances" in REST API

1) CaseResource.getCaseInstancesByContainer
2) CaseResource.getCaseDefinitionsByDefinition

server/containers/id/cases/instances
server/containers/id/cases/case_def_id

it considers instances can be a match for the CASE_DEF_ID