All the details are located here:
It happens in beta also… please help
Do you have a bug report? Simply reporting other people’s issues is not accepted.
If it’s a known bug already in 2017.1 that is being worked on, you can still file a report but making extra posts about it is discouraged as it doesn’t help.
I made post to indicate its in the beta builds not just the normal releases.
It seems they monitoring the beta forums more, and this is a major show stopper bug and not one dev has commented
Looks like it’s fixed in 2017.1.0b2 and 5.6.1p1. If you can still reproduce it, please report a new bug - while it might seem to be related, it could be that you’re facing a totally different issue.