There are also many improvements to the zwave stack in an optional zwave firmware update bundled with release 2.3.1. You might want to try that update and then do a zwave firmware update from the zwave details page.
It would also be a good idea to check for ghost zwave devices.
Yes. Tried three up/three down. Also tried pulling out little tab under paddle switch and push it back in then 10 taps up for factory reset. Neither gave any blue led feedback as to success.
Any device with no route is a potential issue. 0D might be OK and show up with a route but 12 definitely is an issue. The best way to address it is to see if you can remove it. You'll need to air gap the device first.
Yep, 2 ghosts. Get rid of those. Shut down the hub, unplug (at the wall not the hub) for 5 mins, power back up, factory reset device and attempt pairing again. If your devices were previously attached to another hub, you either need to exclude them first (you can do this on the hubitat) or factory reset them (my preference)