Would it be possible for you to test with the coordinates provided above and see if the sliders appear correct for you?
point1: (0.0, 0.0, -6.0)
point2:
(0.8060793615028174, -4.596267436520017, -6.0) -> this should appear incorrect
(-6.465520758172843, -1.1339033066529178, -6.0)
(0.0, 0.0, 0.0)
I have also pushed my test code to a repo if you would like to try there.