That unfortunately did not work. I am only getting the ipv4 address now, but I still get the same ECH error in chrome 1/5 tries.

Firefox now changed errors from ‘invalid certificate’ to ‘connection is insecure but this site has HSTS’. Still wont show the cert or provide any further info. (forgot to grab a screenshot before the below ‘solution’)

I’m really annoyed at this point and have just disabled cloudflare proxying for this service. That seems to have sorted it for all browsers. I may look further later, I may just say fuck it and leave it like this. Gotta walk away for a bit.