Issue while expading Last group item

[raveesh08]

hi,
everything works fine but when first group item is in expanded state and if i click on last group item,First group item jumps up from its normal position in the screen about 10 Pixels then it comes back to its original position then it collapses.
please check this out once
No issue with last item.
Tested in :
Android 5.0.2
Nexus-6