Widget with relative date text not updating when device is locked

I have a widget with a SwiftUI Text timer date. It countdowns as expected. However, when the device is locked, the timer is frozen.

To reproduce it, add the SwiftUI Text(_:style:) view to a widget and place the widget on the "Today View". The countdown should work as expected. However, lock the phone then view the Today View in a locked state. The timer is frozen.

Below is the full working sample code:

import WidgetKit
import SwiftUI

struct Provider: TimelineProvider {
    func placeholder(in context: Context) -> SimpleEntry {
        SimpleEntry(date: Date())
    }

    func getSnapshot(in context: Context, completion: @escaping (SimpleEntry) -> ()) {
        let entry = SimpleEntry(date: Date())
        completion(entry)
    }

    func getTimeline(in context: Context, completion: @escaping (Timeline<Entry>) -> ()) {
        var entries: [SimpleEntry] = []

        // Generate a timeline consisting of five entries an hour apart, starting from the current date.
        let currentDate = Date()
        for hourOffset in 0 ..< 5 {
            let entryDate = Calendar.current.date(byAdding: .hour, value: hourOffset, to: currentDate)!
            let entry = SimpleEntry(date: entryDate)
            entries.append(entry)
        }

        let timeline = Timeline(entries: entries, policy: .atEnd)
        completion(timeline)
    }
}

struct SimpleEntry: TimelineEntry {
    let date: Date
}

struct TestWidget123EntryView : View {
    var entry: Provider.Entry

    var body: some View {
        Text(entry.date, style: .timer)
            .multilineTextAlignment(.center)
            .padding()
    }
}

@main
struct TestWidget123: Widget {
    let kind: String = "TestWidget123"

    var body: some WidgetConfiguration {
        StaticConfiguration(kind: kind, provider: Provider()) { entry in
            TestWidget123EntryView(entry: entry)
        }
        .configurationDisplayName("My Widget")
        .description("This is an example widget.")
    }
}

struct TestWidget123_Previews: PreviewProvider {
    static var previews: some View {
        TestWidget123EntryView(entry: SimpleEntry(date: Date()))
            .previewContext(WidgetPreviewContext(family: .systemSmall))
    }
}

I don't have any data protected data and I tried using a timer but didn't work at all. How can I allow the Text timer to countdown in a locked state?