How to handle Blazor's "attempting to reconnect to server"?

I have a Blazor server-side app and after a period of inactivity, the message "Attempting to reconnect to server..." appears.

I need to extend the inactivity period.

My questions:

1. Is this maybe related to the authentication or application cookie lifetime?
2. Is it possible to extend the timeout, and if yes, how?
3. Is it possible to manually disconnect the circuit to test the reconnection code?