Have you turned off this setting too? Just curious if you’ve tried messing with the settings, and whether they actually change the TV’s traffic patterns you see in the DNS sinkhole. Good experiment at the very least

Pro-tip: have your DHCP server auto-issue your PiHole's IP as the DNS address — this makes all IoT and phones use your PiHole (unless secure-DNS or hardcoded). There are methods to make your firewall accomplish something similar (pfsense?) but I don't know how and DHCP is easier, at least for my network users.

My [now disabled] Honeywell thermostat had the most packet-sends (not data, just #packets). Wouldn't have caught it without my network defaulting to PiHole.