I don't know but i feel like depositing/withdrawing items shouldn't take ages to register. Stuff you put in there doesn't stack, and every once in a while you want to withdraw them and deposit back after stacking in your inventory, but what you can do is to click on withdraw then go take a shower, watch LOTR extended trilogy, sleep, eat, explore the town, have some beer, go to theatre, do all the time consuming stuff you can and hope that the item is withdrew when you come back.
Edit: I made this post and this edit while waiting for my game to withdraw 15 ancestor silks from my guild bank.
Edited by themaddaedra on March 13, 2019 6:56PM PC|EU