We're sorry about this. We can get this checked. Could you please share a download link for the sample media with which you are experiencing this issue? It will help us to diagnose the issue properly at our end.
Here is a 10-bit 422 mp4 from the canon C70. This also exhibits the behavior I speak of. I beleive if you open in PP15.0 and 15.1 the luminanc eon the waveform monitor will be different than if you open in 15.2.
I BELIEVE black should be below 10IRE and white should be 110IRE. I am asking Canon to confirm.