EDIT: At this point I think somehow my dashboard is borked in some fashion. I cannot replicate the errors using the offending service in any other context, only when I open and interact in the specific dashboard that is using the webmap with the layer. I've created a new dashboard for testing using the same widgets, i've added the feature service to new maps, opened the webmap underlying the dashboard, and even created an experience builder 'app' using the same webmap. No problems in any of those cases. Other ideas for troubleshooting steps would be appreciated in case i'm not covering some base. All which leads me to:
Is it possible for a dashboard app like this to be 'corrupted' in some fashion? Is there a way to recover this without rebuilding it completely?
I recently was informed a service we publish on a stand alone ArcGIS Server (v10.9.1) is spawning errors and I posted this question to see what the issue might be: DBMS error message and was suggested that we may be running afoul of this bug - BUG-000140112
Through a little trial and error it appears that the error only spawns when interacting with a dashboard that the layer is used in. The webmap underlying the dashboard does not seem to trigger the error, and I had initially thought this may be linked to some Arcade scripting that summarizes in a popup the data for a point from a related feature table. Now I'm unsure that the script itself is a problem because it causes errors in one context (dashboard), and not another (webmap underlying dashboard).
Any thoughts?