Yeah nextdns regularly blocks things I don’t want to see and many email tracking links fail, some online stores don’t work (https://www.thermoworks.com/) and it’s really easy to turn off on my phone.

I saw some people setup pihole 5min temporary off buttons one way or another to get by. I run lockdown also.

Try disabling ublock or other privacy extensions. Thermoworks add to cart doesn't work on my regular browser with everything but works on my browser that doesn't have those extensions with NextDNS, again it might be one of your blocklists