asp.net核心cookie设置为宽松，并且不会根据以下请求保存在浏览器中

Question

使用asp.net核心mvc，我在操作中设置了如下Cookie：

Option Explicit
Public Sub Login()
    Dim ie As New InternetExplorer               'InternetExplorerMedium
    Const MAX_WAIT_SEC As Long = 5
    Dim t As Date, ele As Object
    With ie
        .Visible = True
        .navigate "https://portal.expeditors.com/expo/login"

        While .Busy Or .readyState < 4: DoEvents: Wend

        With .document

            Do
                DoEvents
                On Error Resume Next
                Set ele = .getElementById("j_username")
                On Error GoTo 0
                If Timer - t > MAX_WAIT_SEC Then Exit Do
            Loop While ele Is Nothing

            If ele Is Nothing Then Exit Sub

            With ele
                .Focus
                .Value = "bob"
            End With
            With .getElementById("j_password")
                .Focus
                .Value = "penny"
            End With

            .getElementById("signInBtn").Click

        End With

        While .Busy Or .readyState < 4: DoEvents: Wend

        Stop                                     '<== Delete me later
        .Quit
    End With
End Sub

在另一个站点上使用ajax调用此操作，例如：anothersite.com 因此anothersite.com使用ajax调用mysite.com，响应头为：

def floodfill(x, y, oldColor, newColor):

    # assume surface is a 2D image and surface[x][y] is the color at x, y.

    theStack = [ (x, y) ]
    while (len(theStack) > 0):

        x, y = theStack.pop()

        if (x == 224):
            continue
        if (x == -1):
            continue
        if (y == -1):
            continue
        if (y == 224):
            continue


        if edges[x][y] != oldColor:
            continue

        edges[x][y] = newColor


        theStack.append( (x + 1, y) )  # right
        theStack.append( (x - 1, y) )  # left
        theStack.append( (x, y + 1) )  # down
        theStack.append( (x, y - 1) )  # up

但是问题是cookie不会保存在浏览器中以用于后续请求，并且同一站点在chrome浏览器的应用程序标签上显示Lax。

知道为什么会这样吗？