JsonObjectConverter sometimes fails to parse FDateTime from json

Development Programming & Scripting C++
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1

Hi there, i am using the JsonObjectConverter to parse some datatime strings from an api into FDateTime. Thats works like a charm unless once in a while when the moon stands correct it doesnt work for particular dates and i cant tell why. I put together a minimal working and failing example

#pragma once

#include "CoreMinimal.h"
#include "UObject/NoExportTypes.h"

#include "JsonUtilities.h"

#include "Try.generated.h"

/**
 * 
 */
USTRUCT()
struct FSomeStruct
{
    GENERATED_BODY()
    UPROPERTY() FDateTime time;
};

UCLASS()
class TQD_API UTry : public UObject
{
    GENERATED_BODY()
public:
    static void TryParse()
    {

        const FString JsonStringWorks = "{\"time\": \"2022-10-10T18:58:42.189834+02:00\"}";
        FSomeStruct OutPutWorks;
        FJsonObjectConverter::JsonObjectStringToUStruct<FSomeStruct>(JsonStringWorks, &OutPutWorks, 0, 0, true);

        
        const FString JsonStringFails = "{\"time\": \"2022-10-10T18:51:58.999814+02:00\"}";
        FSomeStruct OutPutFails;
        FJsonObjectConverter::JsonObjectStringToUStruct<FSomeStruct>(JsonStringFails, &OutPutFails, 0, 0, true);
        
    }
};

The second example fails. I tried stepping through engine code but the converter seems like magic to me. Both dates should be properly iso 8601 formatted.