Since the last release of Kleopatra (3.1.22) the pleaseCertify dialog is no longer shown after importing a single certificate.
I have tried it with
GNUPGHOME=$(mktemp -d) kleopatra ~/certs/andre.heinecke.asc
and it does not show.
According to debug output I added in ImportCertificatesCommand::Private::showDetails the size of the "res" vector is 2. "run-import" in gpgme seems to report only one result and also the Output in the details dialog of Kleopatra is correct.