Well, the game freezes whenever I explore Bank of my one of the other alts. This certainly occurs whenever I look at alt's bank with plenty of room, all slots bough and filled with 28 bags. It worsen situation if an alt has plenty of items that can stack up to 200, the game eventually disconnects me.

It does not matter if my addon are on or off. I have installed: TSM, DBM, Weak Auras 2, ElvUI (without bag component), Skada, AddonSkin etc. but it doesn't matter if I turn them on or off.

Windows button and Alt/f4 do not work. I have to ctrl/alt/del to get out and hard close the game

I have the same problem. Pressing the "Toggle Bank Storage" keybinding (sometimes crashes as well) followed by changing to one of my alts seems to always crash the game.

The game freezes even when trying to view the chars bank via normal bags option. EDIT: Are we talking about the same functionality or are you trying to view alts-bank via bank window and not via Bag -> View Bank ?

Simply typing "/bagnon bank" away from the bank locks up the game for me too. It's a pretty mean one. Same thing with viewing alt's bags, like others have said already. Hope you can look into this.

This happens to me too. Game freezes when opening alt bank when not at the actual bank. I hit Esc button and let it sit and it takes probably about 5 minutes to unfreeze. I dont know what would happen if I didn't hit Esc. Probably just stay frozen.