Idle sessions not killed in NAV 2017

Dear All,

One of the client of mine needs to the sessions to be killed after idle timeout of 2 mins but after all necessary setups in NAV 2017 Administration, the session is not killed.

The point that shocked me is if the user stays in other pages like any card or lsit pages, the idle session is killed automatically.

But when the user stays in Search bar in top right of RTC, the session doesn't get killed.

Has anyone faced this problem earlier? If yes, your suggestions and feedback would be valuable to solve the issue.

Thanking you,