Thank you for sharing the issue and I am very sorry to hear that!
Unfortunately, since this addon is developed entirely by Epic Games, we don't have deep access to it. Have you tried to export the model to Datasmith format and import it into Twinmotion?
Other than this, I suggest posting the question to Twinmotion support here: https://twinmotionhelp.epicgames.com/s/?language=en_US
They should be able to help you with further investigation.
Thank you very much for your understanding! Please let me know if you have any further questions!
Technical Support Engineer