javascript - Rubaxa sortable, dropping on empty space to the right of inline elements -

i'm trying use rubaxa sortable library inline-block elements.

an example on following jsbin page:

http://jsbin.com/qidalolero/1/edit

i've noticed following behaviours:

• the first item picked (in order picked up, nothing element order) can dragged red box anywhere, , sit nicely on left (desired behaviour).
• the second , third, however, must either
  • dragged on existing item, or
  • dragged empty space below list

how can make items can dropped right of existing items, @ same height? application doesn't have empty space underneath users have drag on existing item before ghost item appears in list.

looks fixed in this issue.