This happens every time you call nslookup, dig or host. Replacing libuv_1.48.0-1_armv7-2.6.ipk with 1.44 version from bin.entware fixed the problem
Found some information here https://github.com/Entware/Entware/issues/976
Unfortunately the new version of libuv from maurerr's repo doesn't work with bind-tools. And I spent a lot of time figuring this all out.
netmgr/uverr2result.c:101:isc___nm_uverr2result(): unable to convert libuv error code in udp_send_cb (netmgr/udp.c:804) to isc_result: -38: function not...