Automatically Idle Client Timeout - NAV2016 - doesn't work!

Hello,

I have problem with NAV 2016.

I set at the NAV Service Instance property: Idle Client Timeout for 10 minutes (00:10:00), but it doesn't work.

If i set this property for 1 minutes (00:01:00) it's work, but only if i go deeper in app and leave idle.

I have seen many tutorials about set this property, but neither of them doesn't work in my case,

If you have any suggestions please let me know.

James