Attackmode Storage Not Working

[WIFI Darth Maul]

As the title states, the Attackmode Storage command isn't working when it should be.

Here's my example code:

ATTACKMODE HID

DELAY 500

GUI r

STRING cmd

ENTER

DELAY 500

ATTACKMODE STORAGE

Then after that the USB storage partition does not mount

 

EDIT: I'm using the new Rubber Duck, and I found the solution. Like this user, I was using the old encoder, don't use it. Use Payload Studio instead.