Pilling up here a bit, I was also told that fdb would only seldomly use DNS (Which publicIPSource to use when using FDB with multi-region and kubernetes? - #2 by johscheuer) but
date; tcpdump -i any port 53 -n -c 1000|grep fdb-cluster-log-72213.fdb-cluster.fdb |wc -l ; date
Shows 54 queries (A and AAAA) over the course of 8 seconds for a single pod.
When look at all the queries made I have ~500 queries over the 8 seconds