Meeting chat not showing

Hi,

I have testet teamviewer 12 and meetings with a couple of users.

For the Windows user, it seems to be working fine but the one mac user connected to the meeting doesn't receive chat messages sent to everyone. When mac user send chat messages to everyone, they receive it. 

When others change from "send to all" to just sending the message to the mac user, she receives the message.

Is this a bug?