Hearthstone Pack Opening Interuption
So I retested this last night.
- I got my card counts to where I could see the increase even if I got a duplicate
- Busted open a pack
- Accepted an invitation from a friend before opening the pack
- Went back to the pack opening screen after completing a game with my friend, the cards were again gone
- Checked my collection
I did have 5 new cards; so I must have got 5 duplicates last time too.
The cards are opened as soon as you open the pack; you do not need to click on the cards to open them and 'send' them to your card collection.
Cards do not show as new if you have 2 or more of them, so it is likely you got 5 duplicates and they are hidden away in your deck somewhere.
http://us.battle.net/hearthstone/en/forum/topic/17086419786