when hitting external URL: fetch failed and getaddrinfo ENOTFOUND

We have a server running Prefect at a url, we send post requests to this server regularly through cloud functions.
Recently appwrite has not been able to access this and the post requests end up in 'fetch failed' error ( using undici fetch ) ,
Trying to do a health check ( with node-fetch) results in
request to <url> failed, reason: getaddrinfo ENOTFOUND <url>
the endpoint is working with curl and can be accessed outside of appwrite.

@yash🎧

Adding to above:

dns A record is on appwrite ns. We can do curl requests to the url successfully but not working via appwrite functions.

Let us know if need more details.