Adding unsupported dnskey alg produces empty response

[vohmar]

Request with unsupported alg 666:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<epp xmlns="https://epp.tld.ee/schema/epp-ee-1.0.xsd">
  <command>
    <update>
      <domain:update
       xmlns:domain="https://epp.tld.ee/schema/domain-eis-1.0.xsd">
        <domain:name>1180.ee</domain:name>
      </domain:update>
    </update>
    <extension>
      <secDNS:update xmlns:secDNS="urn:ietf:params:xml:ns:secDNS-1.1">
        <secDNS:add><secDNS:keyData>
	  <secDNS:flags>257</secDNS:flags>
	  <secDNS:protocol>3</secDNS:protocol>
	  <secDNS:alg>15</secDNS:alg>
	  <secDNS:pubKey>P25MwGXr2sTbxdOIKRNbSC8bUO2CObo4/T8kMFoKcgs=</secDNS:pubKey>
	</secDNS:keyData></secDNS:add>
      </secDNS:update>
    </extension>
    <clTRID>timo-1623743824</clTRID>
  </command>
</epp>

Empty response:

<?xml version="1.0" encoding="UTF-8"?>
<epp xmlns="https://epp.tld.ee/schema/epp-ee-1.0.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="lib/schemas/epp-ee-1.0.xsd">
  <response>
    <trID>
      <clTRID>timo-1623743824</clTRID>
      <svTRID>ccReg-9492583033</svTRID>
    </trID>
  </response>
</epp>

Expected result is error
2004 "Parameter value range error! Unsupported DNSSEC algorithm"