You may want to check out my thread here
Related to your issue though along with looking at the Zwave table (which is where I would expect the problem to be) you may want to go look at the logging page and then click on the Scheduled jobs tab. Check to see if you have jobs that are in pending state and scheduled for a time in the past. This was one of of the two problems I experienced with my migration from a C8 to a C8 Pro. To fix this take a local back from the C7 prior to the migration date and restore it over top of the current setup so you don't loose your Zwave Radio. That should do it if that is the problem.
