Just had a look at the Docker container error log in Portainer and found that there is an error being generated almost twice a second for the Kodi container in /root/.
Example output of error log:
2018-08-13T17:50:30.502870934Z Crash report available at /root/kodi_crashlog-20180813_175030.log
2018-08-13T17:50:48.746859336Z ERROR: Unable to create GUI. Exiting
Just had a look at the Docker container error log in Portainer and found that there is an error being generated almost twice a second for the Kodi container in /root/.
Example output of error log: