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!
Technical Support Engineer