I am currently testing to see if this is an issue. Here's a little more information:
MacBook Pro (15-inch, 2017)
2.9 GHz Quad-Core Intel Core i7
16 GB 2133 MHz LPDDR3
macOS Monterey 12.1 (21C52)
LastPass 4.86.0 (1218)
Apple Watch (1st Generation) A1554
WatchOS 4.3.2 (15U70)
iPhone 13 Pro Pro Max MLL63X/A
LastPass App 5.5.2 Built 20/12/2021, 18:25
LastPass Authenticator App LastPassMFA 126.96.36.1995
When signing on to the LastPass for macOS desktop App, using only the iOS App and Authenticator, everything seems to work as it should. However...
When signing in to the LastPass macOS desktop App, using my Apple Watch to authorise the login, I enter my master password and am presented with the MULTIFACTOR AUTHENTICATION window.
The app on my watch pops up and I am presented with the option to "Accept".
On pressing "Accept" I am occasionally allowed into the desktop app on my Macbook. However, almost invariably, it doesn't let me in.
So, I go to my iPhone and open the LastPass Authenticator App and I cannot see any of the 15+ MFA accounts I am normally able to see.
All I see is the "To get started, add your first account by scanning a QR code", with options to "ADD ACCOUNT" or "RESTORE FROM BACKUP".
When this happens, I have to log out of LastPass on the iPhone then go to the Authenticator App and tell it to restore from backup. This directs me to LastPass app, where I have to log in again but using SMS to avoid the fact that the Authenticator App is being stupid!
Additional troubleshooting steps:
1. Turned it off and on again, lot of times!
2. Deleted and reinstalled the iOS apps.
3. Ensured all applications and OSes are running latest versions.
Yes I have this exact same issue and it's driving me nuts. I've turned off notifications from lastpass to my apple watch because it's not only useless, it breaks my multifactor from my phone as well. Apple Watch Series 3 here.
With the help of some log files provided by a customer, we believe we have identified the cause of this issue and have begun working to validate that we are correct so we can release a fix.
Thanks for the reply, @GlennD (tried to @ you but your name didn't appear in the list of users!?).
I'll mark the question as resolved once you have released the fix.
Additional feedback on this behaviour:
A key point in this behaviour is when in Authenticator, while it seems to have forgotten the account it should be signed into, it has a dialogue box to take you to the LastPass app. When you click on this you are taken to the LastPass app but, even though you can clearly see it is signed into your account, in the background, a dialogue box in the LastPass app states:
"Select Account Please log in to the account you want to use with LastPass Authenticator."
So, Authenticator is clearly losing it's shiz about your LastPass account, even when you are clearly currently signed in! But only when you have recently tried to "Authorize" a login to LastPass using an Apple Watch.