Enabling Strip Source Data On Cook on Geometry Collection is also stripping the Anchor flag of cooked assets

Enabling Strip Source Data On Cook on Geometry Collection (GC) is also stripping the Anchor flag of cooked assets. The licensee has reported that once they do a build the Anchors disappear and GCs that previously were using it as a way to hold them still are all falling to the ground.
I've tested this on 5.5, 5.6, 5.7.
I've done some investigating and I believe the anchors are stripped when using bStripOnCook on UGeometryCollection::Serialize:
/** Serialize */
void UGeometryCollection::Serialize(FArchive& Ar)
...
#if WITH_EDITOR
if (bStripOnCook)
{
// TODO: Since non-nanite path now stores mesh data in cooked build we may be able to unify
// the simplification of the Geometry Collection for both nanite and non-nanite cases.
if (EnableNanite && HasNaniteData())

{ // If this is a cooked archive, we strip unnecessary data from the Geometry Collection to keep the memory footprint as small as possible. ArchiveGeometryCollection = GenerateMinimalGeometryCollection(); }

else

{ // non-nanite path where it may be necessary to remove geometry if the geometry collection is rendered using ISMPool or an external rendering system ArchiveGeometryCollection = CopyCollectionAndRemoveGeometry(GeometryCollection); }

}

GenerateMinimalGeometryCollection() might be ignoring the anchor state at this point.

 

The licensee has shared a repro project. I recommend using it because the setup is a bit complex.
Using the licensee's project, you need to create a build and run it.

From scratch:
On a blank project, setup the project so it opens up a scene while running the game.
In that scene, create a static mesh (e.g. a Cube), make sure it is floating in the air
Select it and go to Fracture mode
Create a New Geometry Collection(GC) from the cube
Frature it any way you want, in the FractureHierarchy window, select one or more fragments, Right-Mouse-Click and go to Anchored > Yes setting those as Anchors
Select the created GC in the Content Browser and open it up
Enable StripSourceDataOnCook and save
If you Play-In-Editor you will notice that the Cube did not fall - the Anchors stop if from moving
Save the scene and now go to Tools > Project Launcher and in the window that opens press Launch - that should create a build and open it up for you once it's done.
When done, it will open the game and the scene with the GC Cube.

Expected behavior: the GC Cube should remain floating, the anchors holding it still in the air
Actual behavior: the GC Cube falls to the ground - the Anchor information is stripped along the Source Data on cook