I see the same behavior here:
Here I selected the highlighted face and got the breadcrumbs. The mates also appeared above the breadcrumbs, but quickly disappeared because the left most item in the breadcrumbs is highlighted.
If I move over slightly and make the same selection I get this:
The full set of popups appear.
A little more experimenting shows that the popups are moved up/down/left/right to ensure they are fully visible, but this sometimes places some portion under the mouse and this is interpreted as a hover which highlights whatever popup item is selected, causing other popups to disappear. Whatever placement algorithm they are using isn't ensuring that no popup items are directly under the mouse, leading to this bad behavior. You can really see the problem occur by having some geometry running horizontally across the screen. Select a face and look at the popup:
Move you mouse to the right until you are just to the left of the arrow pointing at the mates and then click again. the popups will move to the right. Keep doing this so that the popup menu moves over until it has extended beyond the viewport border. At some point, it will not move to the right any further:
Make note of the approximate position where you last clicked and then click somewhere off of the model to make the popups disappear. Then click slightly to the right of your noted location and you'll likely see the bad behavior. In my case, the mouse ends up on the mates
and the other popup menu doesn't appear.
That is awesome! I sure hope SW is getting this.