Item data cache if no subscription

[tvhnet2013]

Hi,

My LS javascript client connected to server and got data with no problem. If I open another browser and run that LS javascript client, it works the same.
However, if I close all browser (that will unsubscribe item at data provider), and then open new browser, run LS javascript client again, it got no data.

I don't know if it is my error or LS default behavior.

1. Does LS auto clear item data cache if no subscription?
2. Or my data provider must "resend" snapshot when got new subscription?

Thanks in advance.