Your Session Has Expired

So I'm sure more than one person before me has pointed it out, but is there really a need for a session expiration when visiting/viewing the in-client store? I think that going into the store and receiving the "your session has expired" screen really just feels like a waste of time rather than a heads up.

I'm sure there is some reason that you guys put it/left it in the client, but I feel like there has to be some way to just set the store to re open the front store page when you click out of it and then go back to it again.

I'm not tech guy by any means and this is certainly ONLY A MINOR inconvenience (to say the least). Just looking for some feedback on the idea.