AutoNotification Updated notification loses extra info

I'm trying to use the Update option in the AutoNotification Tasker action. It works, but the Extra Info field of the notification is lost after the update. Moreover, even setting it in the action that updates the notification doesn't help. The updated notification will still not have the extra info. Is that a bug?

 

Here's a test task that illustrates the problem:

Code (Text):

Notification Update Removes Extrainfo (320)
        A1: Variable Set [ Name:%extr To:EXTRAINFO Recurse Variables:Off Do Maths:Off Append:Off ]
        A2: AutoNotification [ Configuration:Title: Test
    Status Bar Text Size: 16
    Id: testid
    Extra Info: %extr
    Group Key: testid
    Separator: , Timeout (Seconds):20 ]
        A3: Wait [ MS:0 Seconds:1 Minutes:0 Hours:0 Days:0 ]
        A4: AutoNotification Query [ Configuration:Notification Apps: AutoNotification
    Title: Test Timeout (Seconds):20 ]
        A5: Flash [ Text:%anid() %angroup() %anextrainfo() Long:Off ]
        A6: Wait [ MS:0 Seconds:1 Minutes:0 Hours:0 Days:0 ]
        A7: AutoNotification [ Configuration:Status Bar Text Size: 16
    Id: testid
    Group Key: testid
    Separator: ,
    Update Notification: true Timeout (Seconds):20 ]
        A8: Wait [ MS:0 Seconds:1 Minutes:0 Hours:0 Days:0 ]
        A9: Array Clear [ Variable Array:%anextrainfo ]
        A10: AutoNotification Query [ Configuration:Notification Apps: AutoNotification
    Title: Test Timeout (Seconds):20 ]
        A11: Flash [ Text:%anid() %angroup() %anextrainfo() Long:Off ]