I do not think so - if nothing was changed in the then installed new build. 
I did not change anything in my theme or plugins or theme components, so there was a change somehow. And it looks like there was something:
You’re welcome - I have to say thank you! 
So I better just be patient and wait?
Not really. With the full sidebar I would need to change a lot in our theme.
People do not need to use the fullscreen chat option in the meantime. Also chat is not very popular here at the moment, but it gains more and more importance. But they can really use the windowed chat version on the desktop.
But if full sidebar is not mandatory and “our” version is deprecated it would be really great to have this issue solved.