I'm not sure what all you want to see in the network traffic. The fetch statements don't seem to be taking terribly long. All Status values equal 200. Below is the network traffic with only fetch types showing.
There are approximately 62,000 data points in the source hosted feature layer, but not all are used in the charts. The charts are powered by a dynamically created feature set using Arcade and are refreshed every 1 minute.
As mentioned, prior to the update the charts loaded without issue, and I actually had the dynamic feature sets refreshing every 30 seconds without a problem. I bumped the refresh rate of the feature sets to 1 minute hoping that would help, but it doesn't seem to.
I thought maybe retrieving the data is an issue, but if I test the Arcade expression, data is returned quickly, even though it's only the first 100 features.
![mpboyle_0-1720469231351.png mpboyle_0-1720469231351.png](https://community.esri.com/t5/image/serverpage/image-id/109141iCA82066E6666D3E2/image-size/medium?v=v2&px=400)