Question related to topic.

I'm flying KUL-CGK-AMS on Garuda with a whooping 8h transfer at CGK which is all supposedly within Terminal 3. Any issues I should forsee as a result of this day spent at the airport?

I'm Skyteam Elite+ so I figure I'll just bum around in the Garuda lounge ideally but worried there'll be some bureaucratic shenanigans that'll keep me from the main terminal or similar due to the long connection.