Any attempt to print or print preview causes all prior selections that are not locked to clear. Those that are locked were locked in the sheet on active trigger.
I know this is an old post but the problem still remains in QlikView 11 (Server 11.00.11282.0, Plugin 11.0.11440.0409).
QlikTech Support has confirmed it as an issue...
Thank you for bringing this problem to our attention. We have logged it with our Issue Analysis team - ID 57884: "Selections are cleared after making a print preview."
I will advise if the issue is confirmed as a bug as well as any other developments in this regard. Please accept our apologies for any inconvenience and let us know if you have any questions.