Custom Primitive Data on BP instance not taking affect while in editor

https://udn.unrealengine.com/s/case/5004z00001n9LsOAAU/custom-primitive-data-on-bp-inst
ance-not-taking-affect-while-in-editor

Original Repo is from 4.27, however, it still happens in 5.2.
This is happening because the Instance Data system does not update the field
UPrimitiveComponent::CustomPrimitiveDataInternal from the data in
UPrimitiveComponent::CustomPrimitiveData (the editable field) when the component is
loaded.
To fix this issue, a call to UPrimitiveComponent::ResetCustomPrimitiveData() can be added to
FPrimitiveComponentInstanceData::ApplyToComponent(...), right before calling
MarkRenderStateDirty()
For Example:
void
FPrimitiveComponentInstanceData::ApplyToComponent(UActorComponent*
Component, const ECacheApplyPhase CacheApplyPhase)
{
...
if (Component->IsRegistered() && ((VisibilityId != INDEX_NONE)

Since ResetCustomPrimitiveData() is a protected function, it will either need to be made
public, or FPrimitiveComponentInstanceData be made a friend of UPrimitiveComponent.
Callstack (If applicable, using -onethread ideally):
Please also provide any relevant project zip files, images, videos, log files etc alongside

Download the Licensee Repo from:
https://udn.unrealengine.com/s/contentdocument/0694z00000PmTwiAAF
Repo requires Unreal Engine source, attempting to generate project files or open
without results in a failure.
2. Once the project is open, open the map CPDTest and edit the Rendering->Custom
Primitive Data Defaults [0] field on the black cube Static Mesh Component by sliding
the slider.
While sliding the slider, the cube is the correct color. When the slider is released, it
reverts to black, no matter the value.