[Bug] Custom Depth/Stencil doesn't work consistently when enabled from Blueprint

Development Rendering
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3

I found workaround for this bug:

In c++ create function and call MarkRenderStateDirty() on your mesh component (after SetRenderCustomDepth()).

Example:

lMeshComponent->SetRenderCustomDepth(InEnable);
lMeshComponent->SetCustomDepthStencilValue(InStencilValue);

lMeshComponent->MarkRenderStateDirty();

I found out that in 4.15 MarkRenderStateDirty was called everytime in SetRenderCustomDepth(), but why epic changed that?