Well looking at the code the addon here is just trying to move the item to the guildbank.
If it fails as the server is not responding again or you get the info (like always) "Please wait for item to be transfered first" it will just do nothing.
I doubt this will work with unresponsive guild banks, and that was the reason why DoItAll is not supporting the mass movements at guild banks as the serves are simply crap and in cowded areas ther eis no way to transfer all via addons as YOU ALWAYS need to wait until the server responsds. And this is nothing an addon would do and repeat -> or you get kicked from the server for spamming
So maybe it works in less crowdy areas, but I doubt it really will work properly. Good luck