DNS Proxy not using assigned servers

Peplink 210 HW4
Current firmware version: 8.1.0

I have the DNS proxy configured to use my local DNS server however it appears not to be using it for resolution as shown here. If I query the peplink210 directly for domains hosted only by my local DNS server no answer is returned. However if I query my local DNS directly I get the expected response.

% dig glomex.www.longshadow @198.18.10.254

; <<>> DiG 9.10.6 <<>> glomex.www.longshadow @198.18.10.254
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 22761
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;glomex.www.longshadow.		IN	A

;; AUTHORITY SECTION:
.			86388	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2020120500 1800 900 604800 86400

;; Query time: 110 msec
;; SERVER: 198.18.10.254#53(198.18.10.254)
;; WHEN: Sat Dec 05 08:54:40 EST 2020
;; MSG SIZE  rcvd: 125

% dig glomex.www.longshadow @198.18.10.116

; <<>> DiG 9.10.6 <<>> glomex.www.longshadow @198.18.10.116
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 22614
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;glomex.www.longshadow.		IN	A

;; ANSWER SECTION:
glomex.www.longshadow.	2	IN	A	198.18.10.115

;; Query time: 5 msec
;; SERVER: 198.18.10.116#53(198.18.10.116)
;; WHEN: Sat Dec 05 08:54:42 EST 2020
;; MSG SIZE  rcvd: 66

My DNS settings on the Peplink 210