I added some DNS exceptions rules in front of my shaper rules :
[image: 1567088623012-dd8edc61-e2d9-4177-be57-4adf0fca8afb-image.png]
The first rule is matched when unbound connects to any DNS server on the net, using IPv4 or IPv6, UDP or TCP, destination port 53.
The second one matches when unbound send s out some DNS traffic on my LAN interface, source port is then '53'. (Destination could be anything above 1024).
The counters show that these rules are matching traffic.
Said all this, I still think your issue isn't shaper related.
Unbound can't connect to "192.168.4.59 - port 1855" : it could be anything, even hardware related.