Dimension - Align Text ?

Hi there,

I've encountered a strange phenomenon in aligning the dimensioned text.

It follows 0°, 180° and 270° (and probably all bearings in between), but at 90°

it follows the dimension-line.  FIrst I thought it was due to an Esnap configuration,

but as you will see there was none.

Kind greetings from Holland,

Gerard