I purchased my second zwave plus (Aeotec Range Repeater 6) device and upon pairing I got the same message when I was trying to pair my schlage zwave plus device.
“your device has been connected, but not using the highest level of security. Use a newer Z-wave device.”
It seems to be like ST hub or the app is not pairing with zwave plus and using zwave. I cant find any information about using zwave plus on ST. Does STv3 simply not use Z-wave plus?