The issue I am facing:
I have a TrueNas Scale server and when I unset my pool, i.e. disable the Kubernetes cluster, this kind of query stops being spammed.
Details about my system:
I am running two Pi-Holes on my network, one in a Raspberry Pi and the one with problems inside a Ubuntu VM in TrueNas sharing a bridge network.
Both Pi-Holes have Unbound and it seems to be the resolver here for this kind of query.
What I have changed since installing Pi-hole:
Moved the Pi-hole from one Raspberry Pi to a VM.