connectToSortable offset is wrong when scrolled down

[gkoberger]

When using connectToSortable, the item is always placed further up the list than it should be when the page is scrolled:

By moving the item up or down, you can get it to go to the right place. However it makes everything jump initially.

It works correctly with 1.11.*, but is broken in 1.11.* (starting from 1.11.0).

1.10.3 (works): ​http://codepen.io/gkoberger/pen/rOBOZO 1.11.4 (broken): ​http://codepen.io/gkoberger/pen/yYBYEm

[Carsten Schmitz]

We experience this issue too - for an example fiddle see here:

​https://jsfiddle.net/kbh63s7f/3/

The fiddle is based on the latest version available.

[Koen Glotzbach]

This is probably not-done, but I'd like to shout-out as an affected end-user: I'm using LimeSurvey and I'm afraid a ranking question for my academic survey yields false results (item doesn't get placed in expected place, and participants probably don't notice). See my initial report at the LimeSurvey bug tracking system: ​https://bugs.limesurvey.org/view.php?id=11078

So I hope this can soon be resolved :)