HELLO!@Siddarth Rumalla
Welcome to the LastPass Community.
In advance we want to apologize for the issue with your browse extension, I will suggest following the steps below to resolve this behavior:
1. Make a single click over your LastPass extension Icon in your browser
2. Go to the bottom right corner click on "Account"
3. Click on "Fix a Problem Yourself"
4. Click on "Clear Local Data"
5. This process should close your session automatically, please log back in and try to launch any of the sites from your vault.
In case the behavior still shows up, please clean your internet browser (Cookies and cache) log in to your LastPass account again, and try to replicate the issue once again.
Please let me know if you need additional help.
Greetings!
Verlaine | Customer Care