Hello,

Since version 4.0.1 (no problem with version 4.0.1-rc1), even the simplest examples are not displayed correctly on all browsers (latest Chrome / Firefox / Safari at least): the dropdown is not displayed under the selector.

Here is an example: https://jsfiddle.net/michaelperrin/zxu8pxn3/1/ (clicking on the selector shows the dropdown, but it is displayed too much on the left).