As soon as you have lost contact with blazor.server.js, any transition to the links of the prejudice causes the error 'blazor.server.js:1 Uncaught (in promise) Error: Cannot send data if the connection is not in the 'Connected' State.'
I suggest in the absence of communication with the server to perform the usual transition by reference, without using server rendering. In this case, you do not need to display a window about disconnect, and the normal reconnection will be performed with the page reloading.