I have a very very simple kineFX setup here where I'm doing a straightforward 90-degree rotation on a box. I move the pivot of the joint to where I want and rotate the box, the problem is the box seems misaligned on some axes. I'm rotating on the X-axis, but the box is now slightly misaligned on its rotate Z-axis! I've never had this issue before. I've checked the joint pivot I can't see any problems with it. I'd really like some second and third eyes on this to tell help me figure out where the issue is here. Thanks much.

I don't see any misalignment. If you unpack and look in the spreadsheet, the points are all on clean expected values before and after the rotation.

interesting

I can also clearly see misalignment, even straight after the Rigpose SOP the 3@transform matrix is already messy, compared to the same with Transform SOP
the pivot value is somehow getting into rotation, the more the pivot offset the more it contaminates the other rotation axes
H19.5.640

tamte
interesting

I can also clearly see misalignment, even straight after the Rigpose SOP the 3@transform matrix is already messy, compared to the same with Transform SOP
the pivot value is somehow getting into rotation, the more the pivot offset the more it contaminates the other rotation axes
H19.5.640

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Yeh the transform is messed up after the rigpose, is this some sort of precision error bug or something?

Since the pivot value seems to end up in or at least directly influence rotation value it looks like a more serious bug than just precision error
I'd definitely suggest submitting a bug regardless

tamte
Since the pivot value seems to end up in or at least directly influence rotation value it looks like a more serious bug than just precision error
I'd definitely suggest submitting a bug regardless

SideFX has confirmed this to be a bug and are working on fixing it!
Thanks for the assistance🙏🏿