Widget Configuration's Selected Parameter Always Reverts to Default

I created an intent for a configurable widget that lets users choose an option for a parameter called "domain."

I've successfully loaded the selectable items for this parameter using the following code:

import Intents

class IntentHandler: INExtension, ConfigChartIntentHandling {
    func provideDomainOptionsCollection(for intent: ConfigChartIntent) async throws -> INObjectCollection<Domain> {
        let prefs = UserDefaults(suiteName: "group.name")
        let domains = prefs?.stringArray(forKey: "domains")
        
        if let domains {
            let optionsCollection = domains.map { Domain(identifier: $0, display: $0) }
            return INObjectCollection(items: optionsCollection)
        } else {
            // If no options, provide an empty list or a default option
            return INObjectCollection(items: [])
        }
    }
}

The issue occurs when I select a value for the "domain" parameter. Each time I select a value and then reopen the configuration modal, the field reverts back to "Choose." Here's a screenshot illustrating the behavior:

Additionally, the widget doesn’t refresh after I change the "domain" value. However, another parameter using an enum ("Stats Type") works as expected.

Is there something I might be missing?

My Environment: MacOS Sonoma XCode 15.4