See this app and all the tips I have below. Start with this section: [APP] SmartStart Manager for Z-Wave (Long Range support) - #2 by jtp10181
When you scan the QR code does it default to LR mode? If not then the device may not even support LR, usually a LR device will scan in as LR.
How did it pair as Mesh? It would only do that if you changed the SS Boot mode, or paired manually via the hub UI.
Any errors in the logs when it tries to pair? Like a bootstrapping error possibly?
Any ghost nodes from failed pairings? How To Remove Ghosts using hub tools or a UZB Stick
