Random Execution Timeouts and getaddrinfo ENOTFOUND on Self-Hosted Appwrite

Hi,
I’m running a self-hosted Appwrite (v1.5.10) on a VPS.
My setup involves calling an external API many times from Appwrite Functions. Under higher load, I occasionally get random failures like:

Synchronous function execution timed out. Use asynchronous execution instead, or ensure the execution duration doesn't exceed 30 seconds.
Error Code: 408
This happens randomly, especially when there’s heavier traffic. I’ve already verified that I have enough function executors available, so it’s not a simple scaling issue.

While testing another script that deletes older documents from a database collection (loop with deleteDocument calls), I started getting errors like:

deleteDocument failed: getaddrinfo ENOTFOUND appwrite.myprojectdomain.com
deleteDocument failed: getaddrinfo ENOTFOUND appwrite.myprojectdomain.com
These were just sequential deleteDocument calls in a loop, so nothing extreme — yet they failed with DNS resolution errors.

Given that both the random execution timeouts and the getaddrinfo ENOTFOUND occur under load, I’m wondering:

Could this be related to DNS resolver overload in Docker / the VPS?

Is there any known issue with DNS lookups in Appwrite functions under heavy load?

Any best practices for configuring DNS servers for self-hosted Appwrite in production to avoid this?

I’ve tested on another server with a newer Appwrite version, but the issue persisted, so it doesn’t seem version-specific.

Any ideas or similar experiences would be appreciated.