Hello,

I would start by using an HTTP debugger, like Fiddler, or one provided when you hit f12 in your browser. Then I would hit your buttons to see if the times there is no action taking place the client sends a request to the server. If it does, I would trace the case where it works and where it doesn't (assuming the request itself appears the same), to see what the server does differently. If the subsequent button clicks don't send a request to the server, I would look at the JavaScript that gets called on click to understand what should be happening and what actually is happening.

Thanks,

Mike