Conflict stops refresh
**Is your feature request related to a problem? Please describe:**

It appears there is a conflict with the SmartThings plugin. Possibly others with similar features where the refresh is stopped when the period refresh to SmartThings occurs and does not resume.

**Describe the solution you'd like:**
Modify how the refresh is monitored to detect if stopped.

**Describe alternatives you've considered:**
Show last update time as part of the accessory to make it more obvious that it has been stopped.

**Additional context:**
<!-- not applicable -->

<!-- Click the "Preview" tab before you submit to ensure the formatting is correct. -->