DNS lookup faster when DNS set manually on PC!!!!

[hajmolaregular]

'm running a newly-acquired 8900AX2400 and have set it up with a Static DNS address pointing at a PC on my LAN (running Pihole). I've found that certain websites load very slowly & sometimes time out (particularly on my wife's iPad running Safari). This doesn't happen if I set the DNS address on each client computer manually to the Pihole LAN address. The client computers' addresses are assigned by the router's DHCP server.
I have the 'Use Router's setting as DNS Server' ticked in the LAN settings and the Pihole IP address set as the primary DNS in 'Advanced setup/DNS/DNS'. The secondary DNS field is blank.
I didn't have this problem with my 7800N and a swap of routers returns the speed (so I don't think it's likely to be a Pihole config issue).
If possible, I'd like to revert back to automatic DNS settings on the clients as I then only have to change the router DNS settings if the Pihole PC falls over.
Does anyone have any suggestions as to how best to troubleshoot this problem?
Thanks![

[billion_fan]

'm running a newly-acquired 8900AX2400 and have set it up with a Static DNS address pointing at a PC on my LAN (running Pihole). I've found that certain websites load very slowly & sometimes time out (particularly on my wife's iPad running Safari). This doesn't happen if I set the DNS address on each client computer manually to the Pihole LAN address. The client computers' addresses are assigned by the router's DHCP server.
I have the 'Use Router's setting as DNS Server' ticked in the LAN settings and the Pihole IP address set as the primary DNS in 'Advanced setup/DNS/DNS'. The secondary DNS field is blank.
I didn't have this problem with my 7800N and a swap of routers returns the speed (so I don't think it's likely to be a Pihole config issue).
If possible, I'd like to revert back to automatic DNS settings on the clients as I then only have to change the router DNS settings if the Pihole PC falls over.
Does anyone have any suggestions as to how best to troubleshoot this problem?
Thanks!
Top

Untick the 'Use Router's setting as DNS Server' under 'Configuration >> LAN' and enter your DNS servers there, once done restart the router

You can then set your clients back to automatic DNS settings