Curious if anyone who has this stand can comment on how their iPhone charging cable is holding up. In all the pictures I've seen the stand puts a sharp bend in the cable when you're standing the phone vertically and you pass the cable through the hole at the bottom. I'm worried that this will put too much stress on the cable and cause it to fray easily. In fact, one review on Amazon mentions this specifically. Has anyone else with this stand run into anything similar?