Default [Q] Auto rotation stops working once per day

I'm guessing this is just an issue with my particular tablet, as I can't seem to find anything to suggest this is a widespread issue, but I just thought I would ask anyway if anyone else has had this issue?

Basically, about once a day the rotation just stops working, usually stuck in portrait. A reboot always sorts it, however, it usually goes again in 12 - 36 hours, with no apparent cause that I can see.

I've done multiple factory resets including wiping and NOT restoring the apps, but to no avail.

Anyone else ever had this issue? (Although I think I probably already know the answer).

FWIW, totally stock 4.4.2.