I’m not sure if openHAB 2.3 is able to work reliable with 2.5 snapshots but I would give it a try:
- uninstall your current zwave binding
- download a recent snapshot zwave binding https://ci.openhab.org/job/openHAB2-Bundles/org.openhab.binding$org.openhab.binding.zwave/
- put it it your addons folder
- restart openHAB
- perform the steps in ZWave binding updates
If you get dependency errors install feature:install openhab-transport-serial through karaf.
For any other possible errors clean the cache.