Buttons in Selector item not updating text color after hiding activity indicator

[n3d1117]

Problem Description: I followed this suggestion to show the activity indicator as soon as a selector item (e.g PetSelectorBulletinPage) is displayed, by using shouldStartWithActivityIndicator = true and implementing presentationHandler.

After hiding the activity indicator, however, the two buttons under description aren't responding to touches, i.e. their text color isn't refreshing after calling setTitleColor.

I think the bug could be related to this line, specifically the parameter elementsChanged being false in function call. However I couldn't find the exact issue preventing buttons from refreshing correctly. Any help is appreciated.

Steps to reproduce: I created a sample project demonstrating the issue that can be downloaded here. Relevant portion of code:

enum BulletinDataSource {
    
    static func makeChoicePage() -> PetSelectorBulletinPage {
        let page = PetSelectorBulletinPage(title: "Choose your Favorite")
        page.descriptionText = "Your favorite pets will appear when you open the app."
        page.actionButtonTitle = "Select"
        
        // BUG: Uncomment the following lines to make buttons unresponsive to UI updates
        /*
        page.shouldStartWithActivityIndicator = true
        page.presentationHandler = { item in
            item.manager?.hideActivityIndicator()
        }
        */
        return page
    }
}

Environment:

• Device: Simulator
• OS: iOS 11.4
• Version of BulletinBoard: 2.0.2 (latest)