AWS MediaTailor channel for my DASH output group getting out of sync with the schedule?

I have created a channel with below settings

Playback mode: Loop Tier: Basic

Outputs: Type: Dash Manifest Window: 60 Secs Min buffer time: 60 Secs Min update period: 2 secc Suggested presentation Delay: 2 secs

Total video content is around 12Hrs which will play in loop.

After play for 4 to 5 hrs, The Program Name I am seeing in Channel Schedule is not same program I am getting from Dash Manifest file. I see around 5 hrs of delay between Current Program in schedule and The program I am getting in manifest file