Just switched from FR265 to FR570 and have been experiencing problems of sleep tracking. In FR265, I don't need to manually turn off Battery Saver option every night to enable sleep tracking. However after switching to FR570, I noticed no sleep recorded for the first few days. After digging, searching on internet and trouble shooting, I found the root cause is the battery saver function disabling the sleep tracking during my sleep. I had been trying to disable battery saver on my new FR570, adjusting the focus mode and power management settings. However the battery saver still turns on itself every night after my bedtime schedule. I have to manually disable it and turned it off in order to enable the sleep tracking recording. It's super annoying. My FR265 does not have this issue. I don't know why FR570 is behaving so differently. How can i disable "battery saver" function to be turned on automatically in the evening?
