Hello @Anonymous and welcome to the community,
First, I'd like to apologize that you experienced such a long delay before you got a reply here. I'd like to help find an answer for you. Are you still having this issue?
It's hard to say what is happening without access to the file. It could be locked rotations, the reference coordinate system, or another issue. Would it be possible to share this file with me? If privacy is necessary due to NDA reasons, I can create a private folder for you. I am happy to do so if you would like.
Best Regards,

Alfred (AJ) DeFlaminis
3ds Max Technical Support Specialist
Autodesk Here to Help | View Max Tips/Tricks | My Screencasts | Autodesk Virtual Agent | How To Reset User Settings | Change Display Drivers in Max | Feature Request Board | Installation and Licensing Forum | 3ds Max Certified Hardware | Network Rendering Troubleshooting Guide
Hello @Anonymous,
I just wanted to follow up here, any thoughts on my previous post? Thanks for the update!
Best Regards,

Alfred (AJ) DeFlaminis
3ds Max Technical Support Specialist
Autodesk Here to Help | View Max Tips/Tricks | My Screencasts | Autodesk Virtual Agent | How To Reset User Settings | Change Display Drivers in Max | Feature Request Board | Installation and Licensing Forum | 3ds Max Certified Hardware | Network Rendering Troubleshooting Guide