HTTP Request overload per flow?

Hey, first post and only about a week into the node-red rabbit hole.
Managed to get my head around building an API of sorts, which allows my homeseer home automation system to trigger node-red to download an image from a local grafana installation.

This is my flow:

I have five in one flow and they all work great.
When i added two more however, the newly added ones were capturing broken files. 42bytes, no image.After some troubleshooting, i moved the two failing ones over to a new flow and they immediately work as expected, without any changes.

What limit have i hit?

What hardware do you run node-red on ?

Unraid Docker, on a HP Proliant Server.
Server itself has spare resource, and the docker container looks healthy