Zigbee temp sensor problem

I have a problem with one of the (sonoff) temperature sensors. A few days after adding it it stops working, then I add it again and it stops again. I use Conbee2 and zegbee integration to control my sensors. What can cause this problem?

System Health

version: core-2021.10.4
installation_type: Home Assistant OS
dev: false
hassio: true
docker: true
user: root
virtualenv: false
python_version: 3.9.7
os_name: Linux
os_version: 5.10.70
arch: x86_64
timezone: Europe/Sofia

GitHub API: ok
Github API Calls Remaining: 4950
Installed Version: 1.15.2
Stage: running
Available Repositories: 889
Installed Repositories: 8

logged_in: false
can_reach_cert_server: ok
can_reach_cloud_auth: ok
can_reach_cloud: ok

host_os: Home Assistant OS 6.5
update_channel: stable
supervisor_version: supervisor-2021.10.6
docker_version: 20.10.7
disk_total: 30.8 GB
disk_used: 2.1 GB
healthy: true
supported: true
board: ova
supervisor_api: ok
version_api: ok
installed_addons: File editor (5.3.3), Duck DNS (1.14.0), NGINX Home Assistant SSL proxy (3.0.2), Terminal & SSH (9.2.1)

dashboards: 2
resources: 2
views: 4
mode: storage