https://www.kartell.com/GB does not load properly on NextDNS
https://www.kartell.com/GB does not load properly on NextDNS - the page begins to part load but doesn't display content. This is a legitimate retail website.
Consistently across multiple devices (Ubuntu Firefox, Apple iOS Safari).
If the Apple device switches to 4G (off WiFi which is using NextDNS) then the page renders fine.
If I look at my logs, no DNS query is being blocked when the page is loaded. Yet switching networks makes me think this is a DNS issue.
How can I troubleshoot this? Many thanks.