[4.15] Opacity Buffer Visualization return all black for opaque-defaultlit objects.

Sooo… like in title. I live beneath the rock imaging that solid geometry with default opaque material will show up on buffer visualization in white or something change ?
General idea is get opacity pass render in sequencer with final image.

GPU: Pascal (GTX 10XX)
OS: Win 10
Engine wher it happens: 4.12; 4.13; 4.15.1; 4.15.2

In documentation there is white so why I see only black