SignalR connection timeouts if browser tab is inactive
We were able to mitigate the issue by increasing disconnect timeout to 90s and setting keep alive property to 10s on the server (ASP.NET app).
GlobalHost.Configuration.DisconnectTimeout = TimeSpan.FromSeconds(90);GlobalHost.Configuration.KeepAlive = TimeSpan.FromSeconds(10);But I'm still waiting for an official response on Github.
As Ben Cameron already stated, I also thinkt it may be connected to the throttling mechanism.See StackOverflow post regarding this issue (contains solution idea):SignalR and/or timer issues since Chrome 88