Z-wave nodes not updating

Hi.
I run hassio on a pi3 and have an issue with my z-wave network. I use the razberry z-wave module.
I notice form time to time that values from sensors not updating in frontend.
It’s solved quickly by press “test network” in config->z-wave. But it still an issue because sometimes it
takes me a while to discover.
Anyway, It seems that the network is working, I have all values updating in my OZW_log.
Guess the hardware is ok.

Any ideas?