Guild stash folder with one tab

Context:
* I'm guild leader
* Act 3 town

Steps:
1. Have one tab in guild stash
2. Create a folder with said tab

Result:
Tab disappears with no tab or folder shown. Instead shown screen to purchase guild stash tab.

Expected result:
Tab shown within folder.

Workaround:
I purchased another tab and then I could see the folder and move the tab out of the folder.

Reference number: 2,888,216,250

Had the same issue, but reloading the map seemed to work.