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  • I changed sorting of the options which did not solve the issue. Also ForwardAgent triggering did not change anything. Commented Jul 10, 2017 at 12:19
  • Probable issue is that you are connecting to the jumphost multiple times, which triggers connection rejection (too many connections -- you would be able to see such error in the server log). Try to use connection multiplexing (I will update the answer). Commented Jul 10, 2017 at 12:21
  • I did not see any error on jump host inside e.g. auth.log — but the controlmaster-configs did solve it (at least for tests I did). Commented Jul 10, 2017 at 12:27
  • It might be in verbose/debug logs ... I am not sure now. Clearly with control master you should get significantly better performance. Commented Jul 10, 2017 at 12:28
  • I will test it a little more. Meanwhile just +1 for the help Commented Jul 10, 2017 at 12:38