Sync mode don't run per project

I have a problem with sync mode in scaler 2.9, in fact on my DAW I have several projects open with Scaler in several projects. The problem is that when I’m in a project, the sync mode refers to all scaler instances that exist on all open projects which poses a real problem as I want to use the leader and followers only per project. In this case, when I’m on my project 3 and I click on Sync, it tells me that 29 other instances are synchronized.