ImageSize in Image widget is not set when setting a texture as a brush

    void SBrushResourceObjectBox::OnBrushResourceChanged()
    {
...
            // Update the image size to match that of the incoming new texture.
            // TODO: Should we always do this?  Or should we avoid doing it if there's already some 'set value'
            // problem is we don't have a way to track that right now.
            ImageSizeProperty->SetValue(CachedTextureSize);  // This function call fails
 

bool FPropertyHandleVector::Supports( TSharedRef<FPropertyNode> PropertyNode )
{
....
	if( StructProp && StructProp->Struct )
	{
		FName StructName = StructProp->Struct->GetFName();

		bSupported = StructName == NAME_Vector ||
#if 1  // workaround
			StructName == NAME_Vector2f ||
			StructName == FName("DeprecateSlateVector2D") ||
#endif