Flashforge Adventurer 3 crack printed same height every time

[curious aardvark]

is the crack (pictures would help) alway at the same height ?
also (the usual).
what filament, what temp, speed etc
:-)

[Nirel]

ABS filamen, 230 degrees (should be good)
Speed on slow, 100 micron.

Happens on same height, here are some pictures:

IMG_20190915_220420 (1).jpg
IMG_20190915_220422 (1).jpg
IMG_20190911_142535.jpg
unnamed (3).jpg
The settings are 100 micron now with slower printing speed.

However I don't want to lower the printing speed even more, a small model already takes about 4 hours to print.
That should not be the problem.