Hi Jason,
Thank you for your question and I am very sorry about the issue!
This is a strange one! I have never seen it with Twinmotion. I'm wondering if it is possible your Archicad model is Far from origin, or have a corrupted element that is causing a similar issue (
https://helpcenter.graphisoft.com/knowledgebase/25447/)? This can be check quickly by going through each story, and click
Fit in Window
at the bottom.
Let me know how it goes for you!
Best regards,
Minh
Minh Nguyen
Technical Support Engineer
GRAPHISOFT