Hi, i have an issue. Sometimes my AW4 locks during night, while sleeping, without a reason... I wear it quite tight, not too loose, and i check that it is unlocked when i go to bed. I have wrist detection on, and i activate airplane and theatre mode at night. I've always done this since i had it (october), never had this issue since 1-2 months... it happened 4-5 nights. I have Autosleep on, and set on the face as complication.. when the AW4 locks,Autosleep of cours stops tracking. It bothers me quite a bit.. did any of you have the same issue? For you is a software or an hardware matter? Note: this never happens during the day, no matter if i'm at the office or at the gym, airplane mode or not etc.. Thank you very much!