Unifi USG and UDM Implementation Not Resolving

Hey Team,

I am having a problem with two of my locations not resolving DNS consistently on NextDNS. I am using an IP linked configuration to each site, one uses an USG Pro 4 and the other a UDM Pro. (Unifi Security Gateway & Unifi Dream Machine Pro) I've notice the issue occurs when lots of traffic/queries are active at each location.

Any way to fix this issue?

Thanks,