Determine what is causing Loading Indicator

I have an application - when it is running on a slower internet connection, every few seconds the application loading indicator appears at the top of the screen for a few seconds.

I have reviewed the code and I cannot see any server calls that are being made and that would cause the loading indicator to display.

Is there a way to debug to see logs of what is causing this to be displayed?

Since the application is sending/receiving data via WebSockets, the Loading indicator can appear even if the application is not making server calls. You can set some settings for the loading indicator, according to documentation:
https://vaadin.com/docs/latest/flow/advanced/loading-indicator