Sorry, the command should be: docker exec -it Transmission ps -A
The weird thing in the log is that at 12:13 transmission is started, but then at 12:23 it's determined to be not running and restarted.
Maybe the initial start is failing for some reason. could you try the ps command in the first 10 minutes?
2017-01-29 12:13:55,735 DEBG 'transmission-script' stdout output:
[info] transmission started
2017-01-29 12:23:55,876 DEBG 'transmission-script' stdout output:
[info] transmission not running