How do I debug multiple calls to EditForm.OnValidSubmit?

[DavidThielen]

Hi all;

I have an issue where on one customer system (using Chromebook) hitting one specific page on my web app (Blazor Server running on Azure App Server), when the user clicks the submit button, it calls the ``EditForm.OnValidSubmit` multiple (2 - 4) times. I have this documented here (for the curious).

I'm 99.9% certain the issue is not my code. The user swears they are only clicking once and this has occurred multiple times on their system. And the submit button is disabled on a click until OnValidSubmit returns and while the calls often come in 0.010 apart, they also sometimes are 1.5 seconds apart, so plenty of time for the button to be disabled.

My question is, how do I debug this? Do I log what is going on in the user's browser? And if so, what am I looking for? On the server side this only happens on Azure so what/how do I debug what is going on there?

I've never faced an issue like this before so I'm at a loss as to what to do.

thanks - dave