Older Leviton devices instant status failure with new 2.5.1 firmware

Ok.. neither of those even has Firmware Update capability unfortunately..

There are 2 posts here about that:

The first one is the biggest: ZWave-JS Update 15.25.3

The second one was a minor update in 2.5.1.143: ZWave-JS 15.26.0

At this point.. I really need to have a device in hand.. But you know these 300 series devices are slowing down your mesh? Especially mains powered repeating devices..