Hello,
I am iOS developer having six years of experience. Developed apps for iPhone, iPad, and iPod in iOS 11, Swift 4 and Objective C 2.0. As I see your message to solve the bugs and I am sure that I can help you to do that.
As of my experience Bug Can be related to iOS version, Swift update, Frameworks, Design bug may happen.
contact: Dipang1988
Waiting for your reply,
Dipang.