Unfortunately, something is wrong with the object file, and it is symmetry and UV-map related. (exact reason still unclear)
When I test with a rebuild object flie all is good. To be continued.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!