Environment

• Package version(s): 3.0.0
• Browser and OS versions: Chrome 67.0, Windows 10

Steps to reproduce

http://blueprintjs.com/docs/#select/multi-select

1. Select many items

Actual behavior

The popover stays in place causing it to cover up the last entered tag once it falls onto multiple lines

Expected behavior

The popover should adjust (I believe it does on scroll) to stay below the input

Possible solution

The component rerenders on scroll which fixes the positioning, this could be called on adding items to the select as well. Scrolling the window by a pixel and back on popoverInteraction will make it work but is not an ideal solution.