Xiaomi Flora sensors are not updating

I have added my Xiaomi Flora sensors within Homey app. But only when I start Homey itself the values are being read from the sensors. And then nothing anymore.
So a reboot will give me sensor reading, and then it gets quiet!
I have seen that in the past there

I have a early model (2016 Backer) version of Homey with firmware 4.2.0 and all the plant sensors are the same latest firmware 3.2.4

Has anyone experienced the same issue?

With kind regards,
Paul