Wake up after 6 hours sleep delay

[aidulcandra]

I used Kaffeine on my project idu-bot.herokuapp.com, and I give it bedtime at 04:30 pm GMT, so technically it should wake up again at around 10:30 pm GMT, however when I checked it, the wake up time is 2 hours late (00:30 am GMT)

I understand that there are many users using Kaffeine to ping their app so that must be the reason. So I'm just wondering how long the delay can take and whether it can take longer than 2 hours.

Thank you