Z-Wave network repair failure is not a new problem, unfortunately. It seems to hit most people when their Z-Wave network gets to a certain size, like 20 repeaters or so, but it can also affect smaller networks if there are misbehaving devices or an include or exclude went awry and messed up the network data.
Once it starts failing repeatedly like that it’s usually very difficult to get it back to working again without sophisticated debugging tools which we have not had a chance to develop yet. Often even if people reset their network (by deleting the hub) when they add everything back it will still have the same problems, which makes me think it sometimes is caused by problematic devices in the network.
I feel really bad that I still haven’t made significant progress on these network problems. I’m the only one working on it and I have a lot of other stuff to do too. Sorry. 