Good morning. I seem to be having some issues with DNS and I'm not sure the exact cause

# kubectl -n longhorn-system exec -it longhorn-manager-5p89q -- nslookup longhorn-backend
Defaulted container "longhorn-manager" out of: longhorn-manager, pre-pull-share-manager-image
;; communications error to 10.43.0.10#53: timed out
;; communications error to 10.43.0.10#53: timed out
^C
command terminated with exit code 1

# kubectl -n longhorn-system exec -it longhorn-manager-wf997 -- nslookup longhorn-backend
Defaulted container "longhorn-manager" out of: longhorn-manager, pre-pull-share-manager-image
;; Got recursion not available from 10.43.0.10
Server:		10.43.0.10
Address:	10.43.0.10#53

Name:	longhorn-backend.longhorn-system.svc.cluster.local
Address: 10.43.107.35
;; Got recursion not available from 10.43.0.10

Basically some nodes are able to reach the DNS service while others aren't. Any idea how to solve this?