It isn't fixed. I checked for an update, the update was applied, and I am running the only copy of the application that I have. About QuickBooks Desktop Mac 2021 shows the version as V20.0.10 R11.2, which is the most updated version.

Whatever email was posted is marked as "removed," so I don't know what I'm supposed to do with that.

In summary, however, the spurious, empty tab creation issue is not fixed.