Some of my tabs are redirecting to old url(wp home and site are working fine)

Hello,

I am running my wordpress site in EC2 instance. I have taken ami backup and launch wordpress instance with new domain. All are perfect. New domain is working fine. But some of my files(tabs) when I clicked on its redirecting to old url.

I have grep in document root[ grep -rn “old-url *” ] command with old url but haven’t found.
don’t know how its redirecting to old url.

Any help much appreciated.
Thanks