Sleep tracking shows large blank gray area in the middle of my sleep

[Weeseamus]

Without any waking, there is a missing area in my sleep tracker of two hours. I tried cleaning the contacts, which seemed to remedy this issue before, but it didn’t solve the problem.

[USAF-Larry]

@Weeseamus, check the Heart Rate chart for the same time period that nothing is showing in the sleep pattern to see if it showed no heart rate during that time.

[utskier]

My sleep tracking also shows blank gray areas during the night.  Usually for multiple hours.  My heart rate tracking is working during these periods.  Any answers?

[Azconnie]

 I have this happen also. Several times. Have you found an answer to this situation yet?