Users list does not display new users with default sort

I imported a first list of users and they displayed correctly on the users list page.

I then imported a second list of users and was surprised to find they were not listed on the users page inspite of successful import. The users are found in the backend WordPress user list.

I then noticed that if I change the sort option on the users list page to “Newer” then the second list of users imported show up on the list!

Any idea why this is happening and how to fix it?

Regards

Sanjay