WebSocket closed with status code: 1006

I am running 3.1 Razor project with Blazor Radzen components, mostly grids, version 2.18.8. I have ~ each 30 seconds “Error: Connection disconnected with error 'Error: WebSocket closed with status code: 1006 ().'. with pages are become disabled for a few seconds. The LB’s do run sticky session, so I wonder what killed the connections. The problem does not manifest itself if I run it locally.

You might need to look this issue: