Hello, IFC! Last night, I took off from RKSI inbound for KDTW in a Delta A350, Callsign Delta 158 Heavy. My FPL took me via CYVR airspace, and as the schedule takes us there today, when entering the airspace, I received an on-guard warning from center to contact their frequency at 10:52:04 Zulu. However, I was away from the device for a solid 7 hours as it was an overnight flight. I know that controllers don’t expect you to tune into Center when you are away from your device, but I wanted to know why this happened? I am pretty sure I am not at fault, but I also just want to make sure.
Thanks for the help in advance! 😁