Modernize your SharePoint team sites by connecting them to new Office 365 groups

SergeiBaklanthat is exactly my scenario. We have a modern O365 group enabled site as our new O365 Collaboration Home. We use the O365 group to manage meetings, notes, communications, etc. for the User Group, but the site itself needs to be open to the entire organization as this is where we post governance, how to articles, tidbits and links to updates like this one. I announced it to the User Group last Tuesday and was getting ready to put it out on Yammer when I started getting access requests from visitors and discovered that "everyone except external" disappeared. Twice. I've spent 2 mos. building this site and can't publish it if it's going to randomly kick people out.

So if Bruno Aleixo is going to have a KB article on this, does that mean this is intended/expected behavior and that Microsoft is not going to fix it? Is Microsoft expecting us to choose between public access in communication sites and group collaboration in team sites? 

Bruno, can you give us a hint please on what this KB article is going to say?