User session bug. Odoo mixing up users.
We are using Odoo 11 system and right now facing a low level bug. The bug is as follows: at a certain point in time, user A (who logged in to system with his login password) becomes user B (The same time user B is kicked out form the system).
When user A became user B, he can perform any actions and write-read any messages form the name of user A. In fact, for the system side he became B and got all his rights. Such a bug appears more often when a large number of people (more than 20) begin to use the system and actively using the system. The bug arises in different modules and even with the first login to the system.