Sortable: Large items of nested sortable can not be inserted on top

[go-two]

JsFiddle: ​jsfiddle.net/355d6yrk

Versions: jQuery 1.11.0, iQuery UI 1.11.4, Firefox 43.0.2, Opera 12.17

How to reproduce:

1. 1. take item72
   2. drop it between item15 - item16
   3. -> it works as expected
   4. take item73
   5. drop it between item10 - item11
   6. -> it works NOT as expected

2. Press button "short text"
   1. repeat the steps 1.1. - 1.5.
   2. -> it works as expected

Hints:
The effect occurs when the text differs by exactly one additional character of item. This can be verified in the JsFiddle example by changing the text length from
this is a loooooooooooooooooooooooooooooooong text (22 'o' chars) to
this is a looooooooooooooooooooooooooooooooong text (23 'o' chars).