Thanks for sharing. Gotta love how technology is sometimes as mysterious as it gets. 
Maybe ticking under/over the hour put it in a just slightly less busy moment for the hub. Funny how things work.
FYI - I did some testing today w/help from @bertabcd1234, and confirmed that his driver is not updating the close tightness setting in the blinds:
For now I'm using the Basic Zwave Tool to update the parameter to my desired setting on each blind. Info here in his driver thread:
And Basic Z-Wave Tool link to Github for manual install is here:
