I dont think the two are related.
Hibernate can be flaky for me too from time to time and I oft wonder why and have considered a post.
During the course of the day the machine will put it self to sleep if left for an hour or sometimes less, also during the day I can hibernate it if going out say.
However I oft find that toward the end of the day when I am ready for bed the machine is not.
If left to its own devices for an evening TV's say
When I come back to it - its still wide awake.
When its bedtime for me - it wont hibernate[shift/standby] and I have to shut itdown.
All very peverse.