I have the same problem, still not fixed.
Hello,
Could you try uninstalling the LastPass extension/Mac app and reinstalling from here? https://lastpass.com/download
If that doesn't work, so that our team can gather more details about this bug and hopefully resolve the issue, could you submit a bug report following the steps outlined here? https://support.logmeininc.com/lastpass/help/how-do-i-report-a-bug-to-lastpass