Sleep tracking inconsistent since a few days

Hi all,

i am using a 6X pro and the sleep tracking was accurate until a few days ago.

Then it started to get weird. First the extended sleep tracking was off, i did not have REM phases but the deep sleep was twice as usual. This looked like the typical tracking on older devices like the Fenix 3

Then the night before yesterday the tracking was back and it worked correctly.

Tonight the watch decided to record a sleep time of 2 1/2 hours only which is completely wrong. It recorded only the time from the point where i went to the toilet until i was up, the > 4 hours before are missing.

As the device records the sleep itself without having a server connect, i assume it's not related to the system outages we had recently.

Anyone else this problem? Will a factory reset help?