Multi-user issue, session_state not unique for each user

[Christophe]

I found the issue and the solution of it.
The problem in my code come from the reset button:

if reset_button:
	st.session_state={}

When I click on it, it destroy the st.session_state and make it global for every user that connect after that.
To solve that I replace it with st.session_state.clear() as suggested here by Goyo.
I think it is a good idea to let this topic here in case new people do the same mistake as me.