Details customization of ustruct - gameplay tags property doesn't show up?

Hi everyone!
I’m currently writing a details panel customization of two structs and I’ve run into a quite peculiar problem: I can’t get struct properties of type FGameplayTag to show up in my customized panel.

Code of UStruct:

USTRUCT(BlueprintType)
struct FRelationEntry : public FTableRowBase
{
	GENERATED_BODY()

	UPROPERTY(EditAnywhere, BlueprintReadWrite, meta=(Categories="Faction"))
	FGameplayTag Factions;

	UPROPERTY(EditAnywhere, BlueprintReadWrite)
	EHostility Hostility;
};

Code of customization:

void FRelationEntryCustomization::CustomizeHeader(TSharedRef<class IPropertyHandle> StructPropertyHandle, class FDetailWidgetRow& HeaderRow, IPropertyTypeCustomizationUtils& StructCustomizationUtils)
        {
            HeaderRow.ValueContent()
            .MinDesiredWidth(800)
            .VAlign(VAlign_Fill)
            [
                SNew(SHorizontalBox)
                + SHorizontalBox::Slot()
                .AutoWidth()
                .HAlign(HAlign_Left)
                [
                    SNew(SHorizontalBox)
                    + SHorizontalBox::Slot()
                    .VAlign(VAlign_Center)
                    .AutoWidth()
                    .Padding(10.0f, 0.0f, 10.0f, 0.0f)
                    [
                        SNew(STextBlock)
                        .Text(FText::FromString("Faction"))
                    ]
                    + SHorizontalBox::Slot()
                    .Padding(0.0f, 0.0f, 40.0f, 0.0f)
                    [
                        SNew(SBox)
                        .MinDesiredWidth(300)
                        [
                            SNew(SProperty, StructPropertyHandle.Get().GetChildHandle(0))
                            .ShouldDisplayName(false)
                        ]
                    ]
                ]
        
                + SHorizontalBox::Slot()
                .AutoWidth()
                .HAlign(HAlign_Left)
                [
                    SNew(SHorizontalBox)
                    + SHorizontalBox::Slot()
                    .VAlign(VAlign_Center)
                    .AutoWidth()
                    .Padding(10.0f, 0.0f, 10.0f, 0.0f)
                    [
                        SNew(STextBlock)
                        .Text(FText::FromString("Relation"))
                    ]
                    + SHorizontalBox::Slot()
                    .Padding(0.0f, 0.0f, 40.0f, 0.0f)
                    [
                        SNew(SBox)
                        .MinDesiredWidth(300)
                        [
                            SNew(SProperty, StructPropertyHandle.Get().GetChildHandle(1))
                            .ShouldDisplayName(false)
                        ]
                    ]
                ]
            ];
        }

Result:

As you can see, the UEnum property shows up perfectly fine - as do, for example, UObject references, bools and everything else. The only type of property that I couldn’t get to display their native property editing widget is FGameplayTag.
I’d be really glad if someone could point me in the right direction.

Thank you very much in advance! :slight_smile: