Popover only moves on one axis

[Ghirigoro]

When a popover collides with another element it will move to avoid it, as far as I can tell it does so only one axis though. I.e. if a popover with side set to left collides it will move to the right even if there is no space in that direction but there is space above and/or below it. Is this by design or am I misusing it?

[benoitgrelard]

That is by design.