@julian Upgrading to 2.5.2 totally fixed the issue.
Many thanks !
Delet chat history and block user for chat
I wanted to know if it is possible to delete chat history. The problem is that if we don't want to leave any trace of conversation, we can't. Members should be able to delete some chat history if they want to.
It'll be even though members may blocked another Member. If someone annoys you, or that you didn't want that he talks to you on the chat, should be able to block it.
If you have a solution for everything, it would be great to tell it to me.
In any case you works great.