stash is something that should be used for only the briefest of times - the only time I use it is "stash, pull, unstash"
If you want to save partial work to a branch, commit it, go do your work on the other branch, then use "reset --soft HEAD^" to undo the commit but keep the work.
If you want to save partial work to a branch, commit it, go do your work on the other branch, then use "reset --soft HEAD^" to undo the commit but keep the work.
Far more reliable