Mirrored parts of a linked Revit model are scattered in 3ds Max scene

Issue:

Mirrored parts of a linked Revit model are exploding in Autodesk 3ds Max scene.

Solution:

Use the workflow below:
1.Mirror the parts in Revit instead.
2.Save the Revit file.
3.Link the Revit file into 3ds Max.

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Source: https://knowledge.autodesk.com/support/3ds-max/troubleshooting/caas/sfdcarticles/sfdcarticles/Mirrored-parts-of-a-linked-Revit-model-are-scattered-in-3ds-Max-scene.html?v=2020