Guild Wars 2

Since March 16 update, when you Alt+drag items from your inventory to the bank the item turns from “Account Bound” to “Account Bound on Acquire” in the bank also these two doesn’t stack with each other.

Take any ‘Account Bound on Acquire’ items, place them in your inventory, change maps, and they will become ‘Account Bound’, and will stack with others.

This works for most items, but not all.

Good luck.