Switching branch and hit 'pull' to fast causes a pull of the old branch into the new one

working with git:

switching branch and hit 'pull' sometimes leads to an unwanted merge, as the 'old' branch is selected.

e.g.

actual branch is "branch1"

now switching branch to "branch2" and hit 'pull' -> active branch is "branch2" but in the pull window there is still "branch1" selected to pull (should be "branch2"). If this isn't noticed by the user, this results of pulling the sources of "branch1" into "branch2", which might result in an unwanted merge of branch1 into branch2. 

Seems to be a timing bug, imho the push and pull options should be disabled while switching a branch. 

This is especially annoying if fast forward is not disabled. 

UPDATE: SEEMS TO BE RESOLVED WITH 2.1.10.0

UPDATE: Reproduced with 2.3.1.0 on the first try.