Adaptive Generic Model generation problem

[vechetBIM]

Hi all,
I have screenshot the problem related to the generic model problem. I made the family as an Adaptive 3points generic model. And the problem is when I set the exact angle rotation which is 203degree it doesn't work ( missing some parts), but if I adjust it to 204degree or something, it works well. Do you guys have any idea why it is like this?
Thanks,

[mphungDCHNW]

Make sure within the family "always vertical " is checked off and replace it with "work plane based" create a object in a project at a angle u want or even a reference plane and you'll be able to place it on that angle.