UINavigationBar Autolayout Issue

Some autolayout constraints broke when I tested an app on an iPad Pro 12.9-inch (3rd generation) running iOS 12.4.1. The issue did not occur when I tested on an iPad Pro 9.7-inch.

[LayoutConstraints] Unable to simultaneously satisfy constraints.
	Probably at least one of the constraints in the following list is one you don't want. 
	Try this: 
		(1) look at each constraint and try to figure out which you don't expect; 
		(2) find the code that added the unwanted constraint or constraints and fix it. 
    "<NSLayoutConstraint:0x600001effa20 UILabel:0x7ff4aa4316c0'Select Department'.top >= UILayoutGuide:0x6000004abaa0'TitleView(0x7ff4ac052920)'.top   (active)>",
    "<NSLayoutConstraint:0x600001eff930 UILabel:0x7ff4aa4316c0'Select Department'.firstBaseline == UILayoutGuide:0x6000004abaa0'TitleView(0x7ff4ac052920)'.top + 28   (active)>"

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x600001effa20 UILabel:0x7ff4aa4316c0'Select Department'.top >= UILayoutGuide:0x6000004abaa0'TitleView(0x7ff4ac052920)'.top   (active)>

Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKitCore/UIView.h> may also be helpful.

The references to TitleView and the UILabel’s title are clues that the source of the issue was the title in the UINavigationBar. The autolayout constraints for UINavigationBar and it’s child views are all handled by UIKit. However, the app did set a custom font in the UINavigationBar’s title.

The size of the font for the title in the UINavigationBar was too large and caused the issue.

navigationBar.titleTextAttributes = [
  .font: UIFont(name: "American Typewriter", size: 32.0)!

Reducing the size of the font, resolved the issue.

navigationBar.titleTextAttributes = [
	.font: UIFont(name: "American Typewriter", size: 30.0)!