Accordion item expands even if there are no child elements.

Accordion item expands even if there are no child elements.

Parameters I use:
                 active: false, 
   collapsible: true, 
   animated: 'easeslide', 
   autoHeight: false,

Please check the attached screenshot.

Note:
The issue disappears if the following steps are done:
1. Open an item with no children (item expands now)
2. Open another item with no children (now this item doesn't expand).
3. Open the first item again now (the item won't expand now).

Version used: