This one is hard to explain. Basically, you can not click on the windows you want to bring them to the front of your screen. Example, I can not bring to the front of my screen the Friend list, if I have the Auction House open; I cannot have the AH in front of the inventory capsules after clicking on it multiple times; In shops I cannot bring the shop window first when I click it, instead of my inventory. In the old client, just by clicking on the window you wanted to show up in front was enough. Here you can't organize them.
New Client:
Friend List vs AH: https://i.gyazo.com/d82969adeefe3fcc91c1965705a34a35.mp4
Shop vs Inventory: https://i.gyazo.com/83a4b918ed7f28d4e16c6870545c72fd.mp4
AH vs Inventory: https://i.gyazo.com/28e836f7f59ccc229888059256e7c1dd.mp4
OLD Client:
Friend List vs AH: https://i.gyazo.com/04383d7b01517ad7a1f76db9dd66efe5.mp4
Shop vs Inventory: https://i.gyazo.com/0525be3ecd4bcee38fd82d51a74f36ae.mp4
AH vs Inventory: https://i.gyazo.com/226413f0a0eefbb50591b505e9a6de0c.mp4