Dear Sir.
I can update your app for you, as I have encountered the same issues with my apps.
Also I have several devices( iPhone7+ and iPad3 iPhone6+, iPhone5, iPad mini) to test your app.
Regards
Relevant Skills and Experience
Objective C, Swift, Storyboard layouts, testflight,
Proposed Milestones
$35 USD - complete job
Additional Services Offered
$1 USD - add advertise