Filling in a Panel Widget Dynamically on Runtime gives error

Hey, I’m trying to fill in a Panel Widget dynamically on runtime with the following code:

    UMainDebugFunctionLibrary::DebugLogWithObject(this, "Updating Section Tree", EDebuggingType::DT_Log);
    for(const auto& section : ClueTree.ClueTreeNodes)
    {
        UpdateSectionSize(section.Value.NodeName, section.Value.Clues.Num());
    }

    // Iterate through the Collected Clue Sections
    for(const auto& section : CollectedClueSections)
    {
        if(IsValid(section.Value))
        {
            UMainDebugFunctionLibrary::DebugLogWithObject(this, "Section Value [" +section.Key +"] Valid", EDebuggingType::DT_Log);
            GetParent()->AddChild(section.Value);
        }
    }

and the UpdateSectionSize function does:

void UClueListManager::UpdateSectionSize(const FString& ClueLocation, int SectionSize)
{
    UMainDebugFunctionLibrary::DebugLogWithObject(this, "Section Size: " +FString::FromInt(SectionSize), EDebuggingType::DT_Log);
    UClueSection* section;
    
    
    if(!CollectedClueSections.Contains(ClueLocation))
    {
        section = CreateWidget<UClueSection>(GetOwningPlayer(), ClueSectionClass);
        CollectedClueSections.Add(ClueLocation, section);
    }
    else
    {
        section = CollectedClueSections[ClueLocation];
    }
    if(section) section->SetSectionSize(SectionSize);
}

The error I am getting:

/Game/CBP/CBP_PlayerCharacter.CBP_PlayerCharacter_C.ExecuteUbergraph_CBP_PlayerCharacter
/Game/CBP/CBP_PlayerCharacter.CBP_PlayerCharacter_C.Add HUD
LogStats: FPlatformStackWalk::StackWalkAndDump -  0.592 s
LogOutputDevice: Error: === Handled ensure: ===
LogOutputDevice: Error: Ensure condition failed: Lhs.CurrentNum == Lhs.InitialNum  [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 237] 
LogOutputDevice: Error: Array has changed during ranged-for iteration!
LogOutputDevice: Error: Stack: 
LogOutputDevice: Error: [Callstack] 0x00007fffeb4f12b8 UnrealEditor-UMG.dll!UScrollBox::RebuildWidget() [D:\build\++UE5\Sync\Engine\Source\Runtime\UMG\Private\Components\ScrollBox.cpp:144]

I’ve isolate the error to the GetParent->AddChild(section.Value) line, but I’m still unsure why that is giving me an error. And to make it more confusing, the error only occurs on the first playthrough each time I open the editor