This is the response I received from support and it does work.
I thought I posted this but I don't see it now. Hope this helps until they get the problems resolved.
I hope you are well. I am here to assist you.
We experienced a delay in our Amazon server, as part of our maintenance process. I apologize for the inconvenience.
The issue has been resolved, everything is back to normal. All scheduled tasks are running properly.
If you missed some orders, please double check in Actions > Orders > Importable.
There you can import any missing orders if needed.
You can also update shipping statuses from Shopify to Amazon.
From the app, go to Actions > Operations > Update shipping statuses to Amazon > [Execute]
