Losing lightlevels from movement sensors

I’m having troubles with lightlevels of my movement sensors. I have two different sensors, one Phillips hue movement sensor (SML001) and one Aqara Lumi movement sensor. Both connected via zigbee / deconz. They both lose the lightlevels regularly. The zigbee connection of both sensors is ok, I keep getting movement detection, battery levels and temperature from both sensors, but no lightlevels.

In the logs I found that the lightlevels from both sensors stopped at the samen time, so I think its clearly an HA issue en not from a sensor issue, because it are two different sensors losing te lightlevels at the same time.

To fix it I have to reconnect the sensors and after that they work fine for some time (sometimes days, sometimes weeks). After a while they lose the connection again. This happend now several times in a few months. I replaced the batteries already, but this doesnt make any difference.

What to do?

Are ou using zha or z2m ?
You probably don’t have enough routers in zigbee network or those sensor are two far from coordinator and they keep loosing connection.

I’m using deconz. Zigbee connection is good, the sensors are connected and are sending movement, battery and temperature info.