We need to continue the SLA time in Issues that were already closed and got automatically Re-Opened by Customer comment. I was unable to find this in the Community, or troubleshooting after 2 hours. 

I was unable to set this up. I tried setting up rules and issue types but there was no option to start the counter again where it stopped. 

Still, I was able to start the SLA time a 2nd time from the beginning but that's is not helping us in any way. We need the timer to start again.

Example.

If Issue type changed to "Done/Closed" the SLA:"Time to resolution" stops at 23:12 remaining. 

If the Customer adds a comment it reopens the Issue and should restart the timer at 23:12 remaining time again but i can only create the countdown from the start again.