How to reproduce?

Preferably have different remotes added. In Sourcetree, we can right click on remote branch and select
Pull [remote branch] into [current branch].
A wizard opens, to pull merge the remote branch.

Actual result:

The remote branch that was right clicked, is not selected in the wizard. Oftentimes, the currently locally checked out branch is selected instead. If, you hit OK quickly, nothing happens if your branch was already up to date with tracked remote branch. Also, oftentimes, in the dropdownlist wrong branches are shown, belonging to a different remote. It is then required to hit "Refresh" first to get the right branches shown.

Expected result:

The branch that was right clicked should be selected in the wizard. When I click ok, exactly that right clicked branch should be pulled.