Well I’ve just checked and they still don’t sync. They were designed not to. When you first create a new set, the views get copied, but then function separately. If you add a relation to one view in the inline set, it doesn’t show up in the same view in the original set.
If it’s really the case on your end that it dos sync, it would be nice if you provided a screencast of it.
I misunderstood what you meant with Syncing, I meant syncing the data put into each variable/attribute, but not the settings panel you showed in the screenshot.
Now it works as intended, thank you for your help.