Your question is bit confusing. Are you referring to the value of the Data page on the clipboard? When you change application the contents of data page instances changes but they are only read only values.
Let me know if you further require any information.
If you create the data page as thread, requestor or node it comes under read only bcoz read only pages have refresh strategy and it refreshes the data page every time you access for specific time and it changes according to the refresh condition if it is editable the page will have only initial values and if you access the page after some specific time it always displays the old data bcoz editable pages don't have refresh strategy and it doesn't refresh the page.
If you want any further information please send the message.
As per my knowledge when we switch application from 1 to 2 the clipboard closes and we need to open the clipboard again to see the refreshed data pages I am not sure whether you refer to the same thing or not?