The New Item window looks like this... It is true that it cannot be resized, and there are times when it would be useful to be able to expand the fields, but at least it fits in the QB window:

The edit item used to look the same, but now it is now wider than the QB window size, and longer than the physical screen.  There is no way to change the width, nor to even get to the bottom of the window:

None of the display options in the "Window" drop-down function as expected.  Both "Tile Vertically" and "Tile Horizontally" show only the malfunctioning edit window.  "Cascade" shows borders for multiple smaller windows as expected, but the Edit Item window does not respect the command, so it is both wider than the QB window, and also longer than the physical screen.

Editing other lists from the "Lists" drop-down menu works the same way that Edit Item used to work: