I may get something wrong here, but it is not clear to me why ungit automatically applies the stash I created on one branch to another branch on checkout. At first, I thought I might have some customized setting triggering that behavior, but I could not find anything like that.

From my understanding of git (and what I use as workflow), the idea is that you can use ´git stash´ to save your uncommited changes on Branch A, checkout another branch B, do some work, get back to Branch A, apply the stash and find everything like it was the moment you left.

Maybe also relevant: If I don't have any stashes and change branches, ungit will throw an error, reporting that theres no stash available.