Strange behaviour filtering on Winbox

The issue is reproduced on 3 different CCR1036-12G-4S on the IP-Binding tab of IP-HotSpot menu.
Whenever you filter with any criteria, and then you double-click that record, the index changes (the number on the pound column #), and sends it to the bottom.
This is particularly annoying since the order in that tab is very important, and I’m getting blocked lines above others.
I’d like to know if this is a normal behaviour, or some kind of bug.
Thanks.