Im not sure if this is a bug but it’s a bit weird. It happens only on the iPhone.
When the text autocomplete appears, it is covering the text box so you cant tell what you are typing.
I suggest raise it a little bit making it more user friendly.
Another weird thing is the auto complete doesn’t close when you do something else on the screen like changing channels and opening the menus. For me this is strange, pop ups usually close when you click somewhere else. You might want to look at that.