Save Current or Save all causes loss of parent child relationship

[eco_bach2]

This particular issue is driving me crazy. I’m trying to parent a static mesh to another object. In this case a simple camera I will be applying random motion to.
I right click the static mesh (Police_Car in attached) in my World Outliner and select ‘Assign To’ choosing the parent object. Works correctly and I can play back my animation in the viewport.

However every time I do a Save Current or File - Save All this parent -child relation ship is lost and I have to re-assign and reset my Transform values.

What is happening? The attached should make this clear.
Using 4.26 Preview 7.

[eco_bach2]

Ok so I might be on to something. https://answers.unrealengine.com/que...6984/view.html These actors are also being used in a Sequencer. So in this case I’m guessing I have to ‘Attach’ in the Sequencer window?

But what does ‘Attach’ mean, attach to parent or attach a child? And what Attach options should be used?

Thanks for any feedback!