[Insert standard “me too” comment here]
The workaround is:
- Take the partial stack out of the guild bank
- Add the two stacks together in your inventory
- Move the stack back to the guild bank.
Really annoying.
Another workaround:
- Move all the reagents to the Warbank
- Log in to a toon that’s on the same realm as the guild
- Take out all the warbank reagents
- Add them to the guild bank normally