Two-factor authentication kicks users back to login prompt

Yesterday when I attempted to log into Gotomypc from Mozilla Firefox, the two-factor code provided by Lastpass Authenticator did not work. Entering it in the authentication blank just brought me back to the login prompt asking for my email address and password.  It happened with the authentication code delivered via SMS request, too. This happened in Brave (a Chromium based browser) and Google Chrome as well. I eventually was able to get in using Microsoft Edge. At the suggestion of a Gotomypc tech on the phone, I cleared the cache and cookies from my other browsers. 

Unfortunately, this morning, the problem happened again across multiple browsers, including Edge and Firefox post-cookie-clearing. I had to try multiple browsers multiple times, and eventually got into Gotomypc via an incognito-mode Firefox window.

One of my other users was affected by the same problem yesterday. She was using Microsoft Edge from a Windows 11 system; I was logging on from Windows 10.

How do we avoid this becoming a problem organization-wide?