Hi JJ
I have tried using the standard handler & that does not work on one of my affected FGK-101.
I came across this thread z-wave-issues-with-firmware-update-30-3 in particular this post talks about end points.
I will change to your v0.9.5.4 & post logs later.
Don’t apologise it is not your fault. It would seem a lot of Fibaro devices are having problems.
See this thread, SHM not disarming & setting off alarms