Hi Egor, Kea 1.9.8 is no longer a supported version; it is also a development release.
Current supported stable Kea releases are 2.4.1 and 2.6.1. Even if this is a bug, I'm afraid it will not be fixed in this version. /Peter
-- ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users. Kea-users mailing list Kea-users@lists.isc.org https://lists.isc.org/mailman/listinfo/kea-users