Yes, upon rereading I see that, too. When I first read it, I understood in such a way that it only would work until (a timestamp of) 65535 ticks since device-st

Yes, upon rereading I see that, too. When I first read it, I understood in such a way that it only would work until (a timestamp of) 65535 ticks since device-startup had passed, but he was referring to durations of that length. Thank you for clarifying.