I do not know how long this one has been there, but when you create a Champion Challenger A/B test in a program within marketing activities, and you click on the test group in the left pane, the test group show up in the right pane, the the left pane is changed to the design studio.
That is annoying. Very rarely do I, personally, left-click on assets within a program (since I use the contextual menu by right-clicking), but I know many who never use this approach and instead rely on the options at the top of the window when left-clicking on an asset. Not a good experience.
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