Selecting an empty option doesn't seem possible

[ppazos]

I have an instance of a select, with an empty option so users can blank the field.

The select picker ajax has a search, when the search is done, and another option is selected, suddenly the "empty" option disappears.

Another issue is: when the user selects the empty option after another option was selected, it keeps the previous option, not the empty one. It seems this use case wasn't considered (selecting and deselecting values).