Sleep Sensor Software Issues

[userVRiF8HC76s]

Update 5/18/26

Past 3 days. One night showed reasonable data. I've included the day before the reasonable data and the day after. This is extremely frustrating. 

I have a Galaxy Watch 7 (2025) Ultra. Sleep tracking is awful. All the garbage about fit, wear, or cleaning do not apply. Every now and then I "might" get a good reading, rarely. Most often I'm getting awake for 6 hours or so. I fall asleep and wake up in the position I fell asleep in. I KNOW, I sleep. What gives? Last year, I was getting good sleep results. After a software update, I started having issues. 

Just an example of bad data collection. I do show some movement but not over 6½ hours of being awake.

Previous night before the more accurate data. Again, no movement or periods of awakening. 

Night before: Good data, even my movement corresponds with the data. I did get up for a restroom break.

Last night's data. Notice no movement corresponding with the periods of awakening the watch claims I'm experiencing. 

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I know others have this issue. I just can't trust Samsung. 

[TJ_Bear]

I have the same issue with not getting an accurate sleep reading. It's got my average sleep time at 4.50 hours. It will also register that I took a nap, when I'm sitting at my desk working. It's frustrating that it's so inaccurate.

[Asumsang1512]

I have the watch 8 classic and was sitting at a lecture, it recorded it as a nap

[Abrec]

Exactly same problem here on watch 5 since last update in December 2025, Samsung, why no solutions ?

[Elizabath]

I think I gat a solution

[BumbleBea]

I have a Galaxy 5 watch. The recording of data is getting worse. This week, it does not appear that any sleep data has been captured. My stress reading is constantly showing High.

[racedog]

Same issue here. I have an Ultra (2024) and an 8 Classic and both give useless info for sleep. Not anywhere close to accurate.

[userVRiF8HC76s]

Recently, as in the past few days, my sleep issues, after months of incorrect sleep data, has resolved the issues and now reports more correct or at least believable data.

As I have issues with both bradycardia and tachycardia correct sleep data is useful. I know it's not medical perfection, but the watch data and the health app help with a trend. Trends are very useful.
I did go to my heart doctor and got my beats corrected. Maybe that solved the issue of incorrect data saying I'm awake 6 hours out of 8 hours saying I'm awake when I have not moved at all during the night. The movement line was flat when the data said I was awake. So maybe the software issue may have been fixed.

[userVRiF8HC76s]

SLEEP ISSUE has reappeared. Can't believe this. My watch was doing fine for a few days and has started the sleep data collection issue again.
I've enclosed a snap of last night. I make sure my watch is clean and my wrist is well cleaned and have even swapped from top of wrist to underneath. I also make sure I have a good charge as well. Only thing I didn't do is a cache clean but that should be a Samsung issue.

[paueck]

I am new to Samsung watch (8), having swapped from fitbit, and my sleep is completely wrong (only tracking part of the night and/or with empty spaces in my graphs), possibly because of medical condition, and medication interacting with noradrenaline which increases my RHR from ~60 BPM to a 73 BPM avg, and messes with my sleep stages. My Fitbit luxe sorted it out. What to do?