ZHA breakdown since 2023.3.4 update
Logs :
Logger: homeassistant.config_entries
Source: config_entries.py:425
First occurred: 08:45:48 (1 occurrences)
Last logged: 08:45:48
Config entry ‹ Paserelle Zigbee / Ethernet › for zha integration not ready yet; Retrying in background
I answer myself.
The problem was not caused by the update.
It was my Ethernet / Zigbee box that crashed when restarting HA after the update.
I restarted my Ethernet / Zigbee box then HA and everything went back. As I was not at home I had to wait until tonight to do the restart.