Give them time and they seem to start working on their own!
Due to electrical work I was doing in my house where I had to shut off breakers - I had two GE Switches fail - I removed them and replaced them with Minoston switches. Then a few days later I created a little test setup so I wouldn’t have to install them to see if I could get them working and lo and behold they worked as switches and I was able to include them in my SmartThings system. I had a use for them elsewhere in my house and installed them in those places and for the past month and a half they’re working fine.
This week I had to shut off power to an electrical panel powering one of the relocated ZW4005 switches. Upon restoring power to the panel I got the blinking blue light and the switch didn’t work as a switch or as a z-wave device. I was able to do a Force Exclude to remove the switch from the SmartThings network. The next day (without me doing anything) the blinking blue light became a solid blue light and the switch worked as a switch. The following day after bringing the SmartThings version 2 hub close to the switch I was able to include it in my SmartThings network.
My conclusion: - you remove power from the switch and it gets stupid. Give it time and the stupidity fades and the switch returns to life. Worst part - shut off a breaker and the switch is likely go stupid again. The real stupidity is the design of these switches so that they behave the way they do.