I\'ve been searching for answers for quite some time on this as it continues to plague me. We store user login info and other data about the user\'s current activities in Sessi
One more condition is there where sessions can loose its value.
You can use Fiddler tool to trace out this problem.
The most condition can be found when you some element like source not found in solution. At that moment server will try to reload that unfounded or lost object by restarting the project. Restarting the project will resulted into resetting all session objects.
Thanks.