Unity [UNET] Sync non-player object transform not working

Found the solution. Somehow the Network Transform component in the object was set for "Sync 3D Rigid Body" instead of "Sync Transform" in the parameter "Transform Sync Mode". Changing to Sync Transform instead solved the problem and the "magnetic" or "elastic" effect does not occur anymore.

Important .. for 2018 ..

we determined

There is some flakiness with NetworkTransform if you are using localhost during development, perhaps particularly on Mac.

it's a real PITA. Be sure to test on normal LAN with a few machines.