This likely is o/t for the thread :-) Did you lock the screen during the sampling?

Clearly your device is spending a long time in in state C2. Mine is ca. 85% in C4. But first, apples with apples, so check what I asked above and do so.

Others chip in here who know better than I. Methinks given the new setup, a reflash may be easiest, step by step checking at each point that thge device is behaving.