"Invite Friends" don't show all my friend list

[fromgizawithblood]

I have a lot of friends in my friend list and I can't see anyone under letter "H". The scroll is working but noone appearing. I clicked right under the last person and accidentally added somebody
I've attached the screenshot to show the problem

 

[pinoygamestore]

Hope they'll be able to resolve this / add a search function in-game