BGContinuedProcessingTask does not work on the official release of iOS 26

The following code worked as expected on iOS 26 RC, but it no longer works on the official release of iOS 26. Is there something I need to change in order to make it work on the official version?

Registration

BGTaskScheduler.shared.register(
    forTaskWithIdentifier: taskIdentifier,
    using: nil
) { task in
    //////////////////////////////////////////////////////////////////////
    // This closure is not called on the official release of iOS 26
    //////////////////////////////////////////////////////////////////////

    let task = task as! BGContinuedProcessingTask

    var shouldContinue = true
    task.expirationHandler = {
        shouldContinue = false
    }

    task.progress.totalUnitCount = 100
    task.progress.completedUnitCount = 0

    while shouldContinue {
        sleep(1)

        task.progress.completedUnitCount += 1
        task.updateTitle("\(task.progress.completedUnitCount) / \(task.progress.totalUnitCount)", subtitle: "any subtitle")
        if task.progress.completedUnitCount == task.progress.totalUnitCount {
            break
        }
    }

    let completed = task.progress.completedUnitCount >= task.progress.totalUnitCount
    if completed {
        task.updateTitle("Completed", subtitle: "")
    }

    task.setTaskCompleted(success: completed)
}

Request

let request = BGContinuedProcessingTaskRequest(
    identifier: taskIdentifier,
    title: "any title",
    subtitle: "any subtitle",
)
request.strategy = .queue
try BGTaskScheduler.shared.submit(request)

Sample project code: https://github.com/HikaruSato/ExampleBackgroundProcess