I think this is properly fixed.
the problem with the "and" and default or conditions is that the semi transparent region is overdrawn until it is opaque. Makes positioning blocks tricky. probably better if it was possible to define a win region that was drawn once and could be referenced repeatedly in the win or lose conditions.
original
https://box-stacker.artificialworlds.net/d/114-plinko-precision/10
win condition fixed
https://box-stacker.artificialworlds.net/d/318-plinko-precision-fixed
lose conditions fixed as well
https://box-stacker.artificialworlds.net/d/319-plinko-precision-fixed-2