Elsewhere on SO, someone suggest that where you have this:
aTitleView.font = UIFont(name: "Roboto-Regular", size: 15)
…you should try writing this:
aTitleView.font = UIFont.init(name: "Roboto-Regular", size: 15)
I can take no credit for this (because I can’t reproduce the bug) so I’m just guessing! But it would be very interesting to know if it actually works.