Pinch and add on top or below crashes app

[iOS]

How to reproduce:

To make it easier to explain:
—> Create a new list
—> Add 2 items
—> Pinch and hold as if to add an item in between
—> Top above item 1 or below item 2 crashes the app

[phillryu]

Thank you, honestly putting this a little lower in priority but good to have on the list when we do some bug squashing.