[iOS] Doesnt run js in subscribe in the background?

[proProbe]

#I've noticed a problem with javascript located in the transferUtility.subscribe doesnt run while in the background. My current code is the following:

        transferUtility.subscribe(id, (err: Error, task: TaskObject) => {

            // Nothing in here will be run when in the background

            if (err) {this._handleError(err); return;}

            this._clearAndSetUploadTimeout();
            const {bytes, totalBytes} = task;
            const progress = Math.floor(bytes / totalBytes * 100);
            this._updateProgress(progress);
            this._updateComponentStateOnAWS3Task(task, {lat, lng});
        });

Is this a bug or a limitation of the library or a restriction on the phones themselver?

[jhen0409]

Currently I expected that, only native layer running in the background, so we do all subscriptions in componentDidMount, it should can get current running tasks when restarted.

[beaur]

So can I clarify what happens if the app is backgrounded and the task does not complete? And if it does complete is there a way to tell if it completed successfully or with an error?