In the kifus, white (the victim) is clearly ahead. The passing begins when both territories are clearly defined.

The problem comes at counting time, when stones are marked as dead, here, white doesn't mark dead groups as dead, causing most white territory to be voided.

White is not tricked into passing prematurely. White passed correctly, as all black groups inside white territory are dead. They are surrounded on the outside, they have no potential for eye space and no eye shape.

Based on the moves alone, black loses in both cases. The problem is merely how KataGo is marking stones as dead during counting.