Maya exported the FBX file, imported it into TWINMOTION2026, and then clicked on import again. It is very likely that part of the model will disappear or fly away. I tried setting various scene proportions, but it still repeatedly appeared, and even used the old version import in the settings. Still so.
The same FBX file is very stable in version 2025.2.
Update:
After creating a file on the 2025 version and importing it as an FBX file, I opened it with the 2026 version and repeatedly imported FBX files without encountering any errors.