I think the problem is the printer not getting right what x:0 and y:0 is. This is the values I get from trying to do the bed height map.
X: -20,00 -6,67 6,67 20,00
y:20,00 0,00 0,00 0,00 0,00
y:6,67 11,09 0,00 0,00 0,00
y:-6,67 11,23 11,36 11,52 0,00
y:-20,00 11,21 11,38 11,60 0,00
20:31:55.950 : Z-probe:10.63 X:-32.79 Y:-23.99
20:31:56.471 : Z-probe:11.21 X:-19.45 Y:-23.99
20:31:57.003 : Z-probe:11.38 X:-6.11 Y:-23.99
20:31:57.540 : Z-probe:11.60 X:7.22 Y:-23.99
20:31:58.705 : Z-probe:11.09 X:-32.77 Y:-10.65
20:31:59.234 : Z-probe:11.23 X:-19.45 Y:-10.65
20:31:59.766 : Z-probe:11.36 X:-6.11 Y:-10.65
20:32:00.329 : Z-probe:11.52 X:7.22 Y:-10.65
20:32:01.473 : Z-probe:11.09 X:-32.78 Y:2.69
20:32:01.997 : Z-probe:11.18 X:-19.44 Y:2.69
20:32:02.528 : Z-probe:11.34 X:-6.10 Y:2.69
20:32:03.062 : Z-probe:11.49 X:7.22 Y:2.69
20:32:04.228 : Z-probe:11.11 X:-32.78 Y:16.01
20:32:04.756 : Z-probe:11.21 X:-19.45 Y:16.01
20:32:05.292 : Z-probe:11.34 X:-6.11 Y:16.01
20:32:05.827 : Z-probe:11.48 X:7.23 Y:16.01