Bug in zwave js to mqtt or failed zwave device?

hi,
when i press multiple times on/off on my zwave relay it just goes to Unavailable state…

log here…
http://paste.debian.net/1232682/

is that HA issue/bug or device firmware/hw issue?
Qubino Flush 1D relay ZMNHND

Sounds like you might be using a 700 Series Z-Wave Stick? There are some well documented issues with those sticks. A little additional info on your setup would be helpful.