The progress bar does not auto-update when the network error occured and then restored

[shining2007]

It seems the progress bar will not update anymore when it encountered a network Error.
For example, when I flap the network, the progress bar will stop updating forever.
I also tried to install celery-progress[websockets,redis] instead of celery-progress, but it still does not work.
Do you have any good idea to make the progress bar auto-update when the network is restored?

[OmarWKH]

See related issue #13 for a way to approach this.

I imagine this could be done in multiple ways:

1. Retry continuously with a cool down interval.
2. Retry a few times then give up.
3. Show a button/link for the user to initiate a retry.

I don't know if any of these should be the default behaviour or not.

[czue]

No strong feelings about the default, but I do think that all of these options would be better than the current behavior. Options 1 and/or 2 have the benefit of not needing to introduce any new UI components so I guess I'd advocate for one of those.