I've managed to find the cause of the issue and it's unrelated to the third party tools used.
It seems whenever a custom font is applied to UILabel's general appearance like this for example:
UILabel.appearance().font = UIFont(name: "Galafera", size: 14.0)
(Using Galafera for the example, but it happens on any custom fonts added to the app)
then the app hangs whenever the UINavigationBar has to truncate its title (due to many UIBarButtonItems for example).
I have a project showing the same issue in a regular Swift project without any third party tools. Adding the bar buttons will cause the app to hang on several devices (tested with iPhone SE and iPhone 17 with Display Zoom enabled on iOS 26.5)
(Is there any way to add the example project to the post?)
And is there a workaround available to make sure adding a custom font to the UILabel's in the app doesn't break the navigation bar?
Topic:
UI Frameworks
SubTopic:
UIKit
Tags: