If it is a battery-powered device then be sure to replace the battery with a fresh one, (as the reported power level reading presented by many devices are often not aqurate), and note that power will drain faster if you do not have main-powered Zigbee Router devices close to each battery-powered device.
Also check that your device is connected via a “known good” Zigbee Router device and not directly to the Zigbee Coordinator → https://www.home-assistant.io/integrations/zha#zigbee-network-visualization-in-zha-ui
Suggest add a different model of Zigbee Router device closer to it and see if still have same issue after it connected to that Zigbee Router instead of the previous Zigbee Router that it was connected to.
Regardless of the root cause, before troubleshooting any deeper you should first really take some basic actions to avoid EMI and add more Zigbee Router devices that act as repeaters/extenders so try to follow all the best practice tips in this guide here, as doing so removes many known Zigbee issues:
If that does not work then also recommend upgrade the firmware on your Zigbee Coordinator adapter.
This and more general issues are also covered in ZHA docs troubleshooting section, so read that too:
Also read these other ZHA documentation sections which are also related: