ZHA: Half of my devices are offline

Hello everyone,
I am using ZHA with a flashed itead ZB bridge. HA: 2021.10.6 (latest)

A couple of days ago some two of my temp sensors went offline. I thought it was a battery issue so i changed the battery and re-paired them. They worked for a while.

After they stopped working again i started investigating and i noticed that some of my devices are offline, both AC powered and battery powered.

I reflashed my bridge, restarted everything a couple of times but no luck.

I noticed i am getting an error on the log. I looked around relative problems and there seem to be some in the late versions but i could not work out a solution.

Here is the error:

Logger: homeassistant.components.zha.core.channels.base
Source: components/zha/core/channels/base.py:428
Integration: Zigbee Home Automation (documentation, issues)
First occurred: 12:03:05 PM (13 occurrences)
Last logged: 12:03:58 PM

[0x7023:21:0x000c]: async_initialize: all attempts have failed: [DeliveryError('[0x7023:21:0x000c]: Message send failure'), DeliveryError('[0x7023:21:0x000c]: Message send failure'), DeliveryError('[0x7023:21:0x000c]: Message send failure'), DeliveryError('[0x7023:21:0x000c]: Message send failure')]
[0x7023:22:0x000c]: async_initialize: all attempts have failed: [DeliveryError('[0x7023:22:0x000c]: Message send failure'), DeliveryError('[0x7023:22:0x000c]: Message send failure'), DeliveryError('[0x7023:22:0x000c]: Message send failure'), DeliveryError('[0x7023:22:0x000c]: Message send failure')]
[0x00D1:1:0x0006]: async_initialize: all attempts have failed: [DeliveryError('[0x00d1:1:0x0006]: Message send failure'), DeliveryError('[0x00d1:1:0x0006]: Message send failure'), DeliveryError('[0x00d1:1:0x0006]: Message send failure'), DeliveryError('[0x00d1:1:0x0006]: Message send failure')]
[0x00D1:1:0x0300]: async_initialize: all attempts have failed: [DeliveryError('[0x00d1:1:0x0300]: Message send failure'), DeliveryError('[0x00d1:1:0x0300]: Message send failure'), DeliveryError('[0x00d1:1:0x0300]: Message send failure'), DeliveryError('[0x00d1:1:0x0300]: Message send failure')]
[0x00D1:1:0x0008]: async_initialize: all attempts have failed: [DeliveryError('[0x00d1:1:0x0008]: Message send failure'), DeliveryError('[0x00d1:1:0x0008]: Message send failure'), DeliveryError('[0x00d1:1:0x0008]: Message send failure'), DeliveryError('[0x00d1:1:0x0008]: Message send failure')]

Any ideas on how to troubleshoot?

Thanks in advance.
K.

I re-paired everything and they now work.
The errors still appear but… they dont seem to create any problems.