Thanks for the update @Bastien_Siebman!
@Edyta, sounds like this issue is very specific to your set up and would require for our team to tale a look into your account. Could you please reach out to our support team (How to contact our Support Team ✉) with the following info:
- Email address of two users seeing each other as private
- Screenshots of what these two users are seeing on their end (make sure to include the URL bar so our team can figure out on what task/project this is happening).