DNS delay on first lookup, Ubuntu 19.10 but not earlier versions

[Peter Flynn]

On 31/03/2020 21:26, Chris Green wrote:
> I have a small home LAN with dnsmasq running on a Raspberry Pi to 
> provide DHCP and DNS services.  I have two systems running xubuntu 
> 19.10 and on these systems I see a 5 second delay the *first* time I 
> look up the address of a local host.  Subsequent lookups are fast
> but if the system is idle for a long time (I haven't quite fathomed
> out how long) I see the 5 second delay again.
I've had this many times and always assumed it's my ISP.

Peter