All users see chat messages of other users

[piizei]

Please provide us with the following information:

The chat shows messages written by any user to all users.

This issue is for a: (mark with an x)

- [x ] bug report -> please search issues before submitting
- [ ] feature request
- [ ] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)

Minimal steps to reproduce

2 person chatting same time

Any log messages given by the failure

Expected/desired behavior

chat messages are only shown to person that wrote them.

OS and Version?

Windows 7, 8 or 10. Linux (which distribution). macOS (Yosemite? El Capitan? Sierra?)

Versions

Mention any other details that might be useful

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