It`s not possible to sort accordion-items in a list-style when the containing panel is fixed height, if no height is set it works fine.

In my Application i have something similar (way more complex) within a Tab that is within a border-layout , broke it down in the fiddle without all my stuff to make it easier to see/debug, and here also found that it must be related to the fact that there is a height set there.

Failure occurs when the list is scrolled down about the height of the current Browser`s Window, above this fold everything is fine.

See a fiddle here, this still can be reproduced with latest ExtJs 5, just change the Library in the Fiddle.

Any help what to change would be great.
There are some notes in the fiddle, too.