GND exact-match query is case insensitive, but replies with different response order for "ringelnatz" and "Ringelnatz"

query http://localhost:8080/exist/restxq/gnd/v1/exact-match?q=Ringelnatz and http://localhost:8080/exist/restxq/gnd/v1/exact-match?q=ringelnatz

the order of results changes, even if the resultset is the same. lower-casing the request inside the xql may lead to stable result order if required