The Stop at 8PM condition means that if the action is still running when 8PM comes around, the action is stopped, just as if you clicked the stop button at 8PM.
The schedule condition you probably want is "Ignore between...". Set up something like "Ignore between 8PM and 9AM", and the interval schedule will run every hour starting at 9AM through 7PM.
This message was edited 1 time. Last update was at 21-Sep-18 16:14