@Tescophil Thanks... The DNS rewrite seems to work OK for me. Obviously not ideal as the majority of users don't have a custom DNS solution (Pi-Hole / Adguard). A solution needs to be found here!

Same here for me with a Tapo C110... About 15000 DNS requests to euw1-relay-i-xxxxxxxxx.dcipc.i.tplinknbu.com