Hello TrevtheTruckie, 

Thanks for posting to the community, I wanted to report back that we have not heard of other cases like this on scale. I found this article, where steps 4 and 5 looks like it might be able to help you identity what had happened. 

https://quickbooks.intuit.com/au/resources/product-updates/lodging-bas-using-quickbooks-online/

If you want to take a quick look and see if it help. If not, you can comment here or you can contact support to take a closer look with you? We are happy to help!