Did you try to increase a minimal holding current for steppers or compleetly disable autotune ?
it’s possible that autotune decrease them so much that they can’t hold a load and start slipping - but this is just guessing from my side.
BTW did you re-check stepper positions ?
maybe you mixed them up - you assume following
stepper_z is at -47, 10
stepper_z1 is at 60, 130
stepper_z2 is at 167, 10
but if some of them are mixed (like stepper_z1 is at position of stepper_z2)you will have troubles …
Also i spotted following from your log:
Line 2671: Calculating bed tilt with: [[10.000000000020444, 10.000000000020469, -0.6099888585838182], [59.99999999997655, 104.99999999998252, -0.599988858583838], [109.99999999998875, 10.000000000011248, -0.6099888585838578]]
Line 2694: probe at 10.000,10.000 is z=-0.680000
Line 2719: probe at 110.000,10.000 is z=-0.640000
Line 2824: probe at 60.000,110.000 is z=-0.760000
first one was from tild adjust at 200777 sec - and as we can see it stabilised at -0.60
next lines was from bed_mesh which started at 200785 (8 second differeence)
and immediately we see that Z heights at same points already drifted - Question: How it’s possible ?? it’s clearly something wrong there. Also in thouse 8 seconds (after Tilt adjust and start of bed mesh) phase_shifts was happening 3 times, and many more during bed scanning.