I wish you didn't have to encounter the issue this long, @YouW. 

For now, we're unable to provide a specific time frame for when the investigation of recurring invoices will be resolved in QuickBooks Online (QBO).

If you've already been added to the list of affected users, rest assured you'll be notified via email as soon as we have any updates on the investigation.

In the meantime, you can download the invoice as a PDF and manually send it to your customers outside the program. 

Moreover, you may set up recurring sales receipts to collect payments from your customers monthly, so you don't have to create one every time.

Keep in touch if you have any follow-up concerns about recurring invoices and we'll respond promptly to answer your queries. Stay safe.