Basic Authors Not Showing Up in Blog Post Settings/Content

Title describes the problem. I did not see this problem elsewhere, so am posting this question after experiencing the difficulty three straight times. I am running my site on SS7.1. I had this experience with my very first Basic Author, and IIRC, it simply "resolved itself" after a few days and me experimenting with different profile data entry options. But it's happening again today with two new Basic Authors, both of whom have blog posts being held up by this problem. When I go into the Permissions panel, they are there. But when I go to the Author dropdown in Blog Post Settings/Content, they are not. Any suggestions? TIA!

UPDATE: A couple of hours later, the new Basic Authors appeared in my Squarespace mobile app [iOS], and allowed me to assign them to their articles. However, even though these draft articles appear correctly in my Squarespace desktop web browser editor [MacOS Safari] with their correct authors, the pull-down menu in the desktop web editor for Blog Post/Settings/Content still does not contain their names, and according to that window, no author is assigned. Weird. But at least I seem to have a workaround.

Hi Paul, thanks for the quick post and information. My regrets for not discovering info about the known bug. This is consistent with my updated experience that I recently posted above. And I have confirmed this behavior on another machine. I appreciate the clarity.