This has happened 4 or 5 times to me now, always when im in the shop. It does not happen on any other game and I can rule out it being purely a PC issue. The game will freeze followed by my whole PC and i have to force shutdown and restart.
I have just over 100 hours in the game now, but have only had this happen to me recently (i.e. past 2 weeks or so) so I'd imagine its due to the latest patch.
Would be happy to provide any other details necessary but I haven't noticed any patterns in when it happens other than it always being in the shop and (possibly) being due to opening a booster pack.