[knot-dns-users] 1.5.0 - 1.5.1 bind IXFR problems

Hello, I have recently upgraded our knot to 1.5.0. Then I noticed error messages coming from server Aug 20 05:50:31 knot-test knot[3723]: Incoming IXFR of 'domain.cz' from '192.168.122.193@53': Starting. Aug 20 05:50:31 knot-test knot[3723]: [error] Incoming IXFR of 'domain.cz' from '192.168.122.193@53': Failed - Malformed data. Aug 20 05:50:31 knot-test knot[3723]: [notice] IXFR of 'domain.cz.' with '192.168.122.193@53': Fallback to AXFR. I've done some debugging (I didnt find any more info), I also reproduced this on 2 virtual servers. My Configuration: Bind master (tried 9.8.4, 9.7.3) <-> Knot slave (tried 1.5.0, 1.5.1) allowed ixfr I dont know if its an error in knot or bind. AXFR works fine Thanks for any advices. Regards Jakub Stollmann LiveSport s.r.o.