I have reported this /bug.
I deposited several stacks of mats into the bank from one character so that another character could do some crafting. Stacks were: Emerald, carnelian, pitch, hemming, honing stones.
The stacks disappeared. They were not visible in the bank, at the crafting station, or in either character's inventory.
I have notices a couple of other threads about items disappearing in the bank.
There was a bank issue addressed in the last update to correct the stacking. I would believe that this change may have caused a side issue which may cause errors in the bank.
I advise everyone to not use the bank until this is addressed.