I have an open ticket with IBKR about a very similar (even identical?) topic since a couple of weeks. I have experienced the same problems where on some days Gateway would not recover after a daily reset. In all cases was a disconnect from ushmds involved. Initially I did not respond to the opening post of this thread because I am not using Docker.
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In recent weeks the problem has disappeared. I used to download once per day quite some historical data for a list of US stock tickers (5 years daily data for 230 tickers). Every now and then (once, twice per week?) ushmds would disconnect after I had submitted the data requests, and before I received the results. Immediately after this disconnect Gateway would disconnect all clients and not allow any new clients to connect! Forcing me to kill Gateway and restart it. Four weeks ago I changed my software: now I am downloading a lot less data every day, and merge that with data I already have. Since then has the problem disappeared. What I suspect, but don't have confirmation of, is that somehow I exceeded the "soft limits" IBKR has in place on historical data downloads. In the open ticket I'm having with IBKR I am hoping to get a confirmation that this was indeed the case. I must emphasize though that I never received a warning that I was downloading too much data, or that I had crossed the soft limit.
