If i insert a new node with Shift + A then it gets inserted at the location of the last clicked menu entry. This might be useful in some cases and could be considered a feature compared to older revisions. But it has one big disadvantage. If the node editor window is relatively small then the popup will be drawn over the borders of the window and the node gets inserted outside the displayed window region, which i consider a huge drawback. (You need to drag the content to find the node placed off screen)

I would suggest two possible solutions:

A) Reverting to old behavior. The node will be inserted at the current mouse location when you press Shift+A and not at the last selected entry.

B) Combine both methods: Insert it at last click position if the node bounds aren't outside the window bounds (minimizes mouse movement). Otherwise insert it at the position described in A)