Pen pressure sensitivity stops when I have more than one window open

i upgraded flash cc , have noticed new bugs. here's 1 of them:

 

when have more 1 document open @ time, pen pressure sensitivity stops working. in fact, seems work on newest opened document, stop working on previosuly opened documents. if 1 document closed, pen pressure returns.

 

i'm using windows 8, , cintiq 21ux.

 

steps reproduce:

 

- launch flash.
- open new document.

- select "brush" tool.

- toggle "use pressure" in tool bar.
- draw make sure pen pressure working.
- open new document.

- draw make sure pen pressure working.
- return previous document , attempt draw.
- notice how pen pressure absent.

 

any or suggestions great. thank you.

this has happened me well.  adobe says they're working on it:

http://forums.adobe.com/thread/1381930

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