And there may be the answer. The domains "digikey.com" and "www.digikey.com" are not the same. Your browser is loading "www.digikey.com".
dig +short digikey.com
204.221.76.76
dig +short www.digikey.com
northamerica.digikey.inscname.net.
pciins-046.inscname.net.
a-digikey-001-gyf12.insnw.net.
159.180.84.23
In your log output, "pciins-046.inscname.net" is blocked by Pi-Hole, which is preventing the browser from following the entire CNAME trail to the requested IP address. Whitelist that domain.
To find out which block list is blocking that domain, run this command from the Pi terminal:
pihole -q -adlist pciins-046.inscname.net
These tools are very helpful in solving problems of this type: