Given the code:
```
Regex.Split("lorem \"ipsum door?!\" sit?! amet!!!",
            "(?<=^[^\"]*(\"[^\"]*\"[^\"]*)*)\\s+");
```
Returns:
```
lorem
"ipsum door?!"
"ipsum door?!"
sit?!
"ipsum door?!" sit?!
amet!!!
```

Expected:
```
lorem
"ipsum door?!"
sit?!
amet!!!
```

unescaped regex string: `(?<=^[^"]*("[^"]*"[^"]*)*)\s+`