Hey dude. The white screen has only happened when I go into the ability menu. I swiped over the various abilities to get the tool tip and while reading the screen goes white. The screen automatically goes into full when I press the general menu button from play. I haven't fiddled with the performance options yet so everything is on default. I played for about an hour and it didn't happen. And I mean all loot bags should stay longer not just your personal bag. I thank you for your help and I would appreciate your speed with regards to the sound sliders. Playing without sound is not immersive in the least. Oh yeah how do you use the bank? I clicked on the chest and it went to the bank storage screen but I don't see an option to deposit from your pack.
Thanks for the detailed report! Sound sliders now follow your finger on phones (already live). The next update puts your bag inside the bank on phones: tap an item to store it, tap again to take it back. It also makes the ability menu much lighter, which should help with the white screen. If it still happens, the game will offer a reload (Settings → Video → Low helps too).
Other loot bags stay as they are for now.