Yes! I experienced this while invoicing yesterday. I receive the emails and my customers receive the emails, but they don't show in the system. Especially frustrating since chat not available.

YES NO ONE CAN TALK TO YOU!! what did u end up doing???

I'm on chat right now. They just opened up. They're submitting a ticket to development. If you run the audit report, you should see the transactions you entered there (at least I did).  They just weren't appearing on the main screens where you do the entry.