So if it is only happening from an immediate reboot and they say to wait 20-30 seconds, my guess is you need the capacitors time to discharge any remaining power that is keeping info stored in the ram. This is even an issue with electonics to this day. Just doing a reboot when you have something in the ram causing issues, you can still boot having issues. You are supposed to power down/unplug your computer, modem, etc. and count to 30 then plug the device back in.