Derived Part Loosing work features from parent Assembly ?

[cencinaNB2ET]

I derived an assembly into a simplified part with code.

I include work features.

I Suppress the link to the parent assembly.

Work features (Planes), appear in my derived part under a node  that has the assembly name.

Then I Unsuppress the link to the assembly to carry out an update.

And that node is gone with all the planes.

So my new planes in the derived part that are constrained to the assembly planes are now with nothing to attach to.

Hence Error...

This is something that just happened recently.

Is this known I read a post from 2017 that had a similar problem.

https://forums.autodesk.com/t5/inventor-forum/derived-part-dependent-on-workplane-not-updating-autom...

[bradeneuropeArthur]

are you deriving with a fix LOD or View Representation?