Tracking disabled in private mode after installing?

I noticed that tracking protection is now disabled in private mode after installing this experiment.

Is that intended? Why?

Cheers.

I do see the shield and elements being blocked while browsing tracking pages in private mode, after installing this experiment.

That is not intended behavior, no. Private Browsing Mode should remain un-changed - this experiment should additionally enable tracking protection in regular browsing. If you can provide steps-to-reproduce, please file a bug here: