Step to reproduce:

1) Download attached project and open in Unity
2) Open scene 'springmovebug' and press Play
3) Enable Cloth checkbox on the Game view
4) In the Hierarchy window select -> Player -> D03_PONY_CLOTH_COLLIDER->D03M01HAIR and disable Cloth component in the Inspector window
Observe that gameObject which has a disabled cloth component does not follow parent's transform

Expected result : GameObject, which has a disabled cloth component should follow parent's transform ( check attached video 'expected.mp4')
Actual result: GameObject does not follow parent's transform ( check attached video 'actual.mp4')

Reproduced with:
5.6.0a6, 5.6.3p2, 2017.1.1f1, 2017.2.0b9, 2017.3.0a6

Not reproduced with:
5.5.4p3, 5.6.0a1, 5.6.0a4

Regression since:
5.6.0a5 or 5.6.0a6, project crashed using 5.6.0a5, so I wasn't able to find the exact version
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Fixed in: 5.6.4p2, 2017.1.2p2, 2017.3.0b6, 2018.1.0a1