[13.0][bug] "bus.Bus unavailable" raise exception

[OthmaneGhandi]

Module

bus module

Describe the bug

getting the "bus.Bus unavailable" exception on the log

Expected behavior
Avoid receiving this "bus.Bus unavailable" exception

Additional context
Odoo have already fixed the issue on Odoo 15.0 we just need to apply the patch for 13.0
This is the fix in 15.0 : https://github.com/OCA/OCB/blob/15.0/addons/bus/models/bus.py#L225
This is the current behaviour in 13.0 : https://github.com/OCA/OCB/blob/13.0/addons/bus/models/bus.py#L199