Funny Error in the Designer

I am alone in my project, but now, the Designer seems to add everyone that are connected to the server
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Hi,

Could you share your project configuration from the gateway? Is it fair to assume none of these mystery users have a separate designer open?

On the gateway, Status -> Designer Sessions, we see all the designer opened in the right project

We have our HMI project. I will call them A and B
A and B inherit from project C that define Style Class in Perspective, and common HMI scripting class
C inherits from D that contains generic scripting package

I am alone in project A, there is 3 persons in project B
3 in project C, and we are 2 in project D