Private tabs/windows are meant to avoid that the navigation can be tracked locally by not keeping any traces of it after the session ends.
They were never meant to block data from being sent to sites.
I am aware of that. The issue is that data is being sent to Google's servers even when I have no intention of performing a search. Limited tracking is still possible without data being saved locally. A user typing in a partial url address will have search predictions offered to them. How is that right?
Why not keep the behaviour consistent between the desktop and android versions?