Created Issue: Listpicker with Large lists lose consciousness [9940]

I have a panorama item with a number of listpicker controls to set application preferences that I am binding to a viewmodel. If i go out to another form (for a short time @15 seconds) and return, life is good. If I leave for about 30 seconds, the selected item disappears. This only happens on the listpicker with a large number of list items. (69).

anyone seen this?