I have an old Z-Wave Schlage lock, BE469 I got in 2016. I've connected it to both SmartThings and Hubitat hub and it's stayed connected and run w/out issues for the last 7 years.
I believe that is part of your problem, doing the lock first.
Try the following:
- Pair the lock last, after you've built a strong Z-Wave mesh, including beaming repeaters like Z-Wave switches near the lock. You don't rely on those repeaters for initial pairing, but you want them there/available as soon as the lock is paired.
- Make sure to do a full exclude/reset on the lock before trying to pair
- Put the hub w/in a few feet of the lock for initial pairng - lock pairing is different than pairing other devices and wants the hub to be just a few feet away for security reasons. I used a long Ethernet cord to get the hub next to my lock.
Try the steps below, after you have set up your other Z-Wave devices. This process is very "belt and suspenders" approach, worked for me on ST and HE:
- Exclude the lock from the the network: Extend bolt, press Schlage button, enter 6 digit programming code, then press 0
- Factory reset the lock: Unplug battery, hold Schlage button and plug in battery
- Ensure all existing lock codes have been deleted from the lock itself: Schlage button->Programming code->2->enter 4 digit factory code twice
- Bring hub within just a few feet of the lock and pair the lock with the hub
- Enroll the lock in the Lock Manager app and enter user codes and confirm they are successfully transfered to the lock
