When importing a FBX file and then creating a timeline it can end up separating the elements imported as part of the FBX so it does not run its animation correctly

When importing a FBX file and then creating a timeline it can end up separating the elements imported as part of the FBX so it does not run its animation correctly. In the example, all three cubes should rotate together, but they do not, the top two should go 360 and the bottom one 180.