During the Edge migration, one of my Z-wave switches that I had customized to be a momentary got migrated over to the “Z-Wave switch” driver and no longer appears to support the momentary switch that I need. Is there a way to change this behavior? Would I create a new driver from the old one, or add additional functionality, or create a virtual momentary to accomplish this? I’m really struggling with the Edge migration and feel really dumb.
I’m sure that’s very frustrating. 
zwave switch is just the generic edge driver that gets selected for a Z wave switch that isn’t otherwise recognized.
What’s the Brand and model of the switch? Maybe there’s an edge driver that would be a better match. 
I believe it to be the Linear FS20Z-1 Z-wave device.
Have you tried creating a routine that every time you turn on the switch it turns it off after 1 second?
Yes, great minds think alike. I did do this, but it’s certainly a “work around” with shortcomings.