RT-AC3100 - DNS_PROBE_FINISHED_NXDOMAIN

Hi all,

I have some issue with my RT-AC3100:

When I go to some website I receive this error :
- DNS_PROBE_FINISHED_NXDOMAIN
After quick seconds the website works.

I have ASUS Merlin 384.19 with amtm 3.1.8 FW and plugins :
- Skynet
- scMerlin
- Entware packages


I have also 2 WAN configured with DoT (Google):



So...how solve this issue ?
Thanks,
Regards,