Stash changes are lost

A few times now, I have configured new stash tabs with names and properties and put some in folders. When I next look at my stash, these new folders have the default "1", "2", etc. names and are all back in the default new tab location top right. They keep their contents.

Update - this happens consistently when you make stash changes such as tab names and new folders and then add a new stash tab.