The below discussion confirms "DNS-Proxy in routing-instance is not supported". If you still see the same issue we may have to wait for this feature.
https://forums.juniper.net/t5/SRX-Services-Gateway/DNS-Proxy-does-not-work/td-p/281528
The below discussion confirms "DNS-Proxy in routing-instance is not supported". If you still see the same issue we may have to wait for this feature.
https://forums.juniper.net/t5/SRX-Services-Gateway/DNS-Proxy-does-not-work/td-p/281528