I set up x4 new Digital Ocean Droplets running Wordpress, and set each up following exactly the same process: Start the Droplet, set up Wordpress, change the domain setting from the IP address to the domain, point the DNS.
The first two work fine, the second two are stuck in DNS loops:
I've checked the DNS settings and they're all the same, they all correctly have an A record for their required IP.
Given this uniformity I have zero idea why this is happening. Any ideas??