What duty does a UDRP complainant have to withdraw a case?

Did this panelist let the Complainant off the hook? GDPR and the near-universal implementation of Whois privacy have changed the process of filing UDRP cases. Before GDPR, a complainant either knew the identity of the domain registrant or knew the public Whois information was bogus before filing. Now, with privacy the default for most registrations, [...]