This past week Samsung replaced the sleep cycles in the health app with sleep latency. I wish they would have kept it the old way, and added sleep latency as a feature. However, since the change my deep sleep also changed, well, at least that's what the app is telling me. I suddenly only get exactly 20 minutes, for four nights in a row now. That can't be right.
Any suggestions / insights on that? It almost appears it doesn't measure properly.
I went as far as downloading the app where Samsung itself took over my phone they can't even figure out how to backup to my Samsung cloud from health connect when I hit export from there's no option to choose anything not even my Verizon cloud or Google . They say I can delete the entire sleep cycle but the option itself isn't there! The only way I figured it out is you can delete the false sleep readings if it's same day . So I'm constantly checking after sitting longer then normal I also turned sedentary on and move my arm around to get movement recognized. Which let's not even get started on the inaccurate step recording lol
The problem is not with the hardware but with the latest update including the sleep latency in the score. When you look at the numbers, the watches and rings can't reliably detect when you go to bed and as a result misjudge the time it takes you to go to sleep.
I reached out to Samsung as well, under Samsung HEALTH APP issues, see link below. Maybe you call do the same? The message cut off at 200 characters. Let's see what happens.
As of May 30, 2025, sleep app shows deep sleep as zero for every night since then. Prior to that it always recorded some amount. It is not likely that I did not have any deep sleep for the last 2 weeks. Other sleep categories are tracked and seem reasonable and consistent. As a test, I also set watch on sleep apnea detetection for the last week. It has shown no results.
It is, actually, indeed possible you went two weeks without deep sleep. If everything else is recording properly, it is unlikely not to record periods of deep sleep, however brief, if you are having them. The sleep apnea may not have recorded anything because you are not showing signs of sleep apnea. Are you tracking snoring? Are you showing results for snoring? If you are tracking snoring, you will see in the snoring section, either snoring statistics, a message that says "you didn't snore last night", or "snoring wasn't tracked because <insert reason>". Sleep apnea and snoring are only tracked if your phone is plugged in and charging while sleeping and the phone is placed on your nightstand. For all other sleep tracking, the phone does not even have to be in the same room. Also, make sure your watch is snug and didn't loosen up.
The watch uses the same sensors for all phases of sleep. Which sleep state gets recorded is entirely dependent on your body's processes. Different heart and respiratory rates for each stage of sleep.
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Anything is possible, but after a couple of years of always having some deep sleep and then suddenly none for an extended period of sleep is not likely, when nothing in my habits, schedule and activity has changed much. The sleep apnea only requires 2 nights out of 10 to get a result of yes or no on sleep apnea and it reports the result of regardless of whether positive or negative. My phone is always on the charger and on the night stand.
The watch has the same sensors for all phases of sleep but these are just collecting the raw data; the algorithm is responsible for convertng, formulating and reporting the result in a meaningful way. It is more likely that these new skewed results are the result of programming or mechanical issues.
You are not alone. Mine stopped registering deep sleep on the same day. I have seen a couple other posts, one somewhere in these forums and one on Reddit. So far no responses from Samsung. Going to chalk this up to another bug that we will be gaslighted on until it just fixes on a random update someday.
I also was having the same problem. After tech support did their thing, I was directed to send my watch in for repairs. As of today, it is out for delivery to the repair center.
You know after that they are just going to suggest you buy a new watch. I wouldn't do that. I am giving it until the end of the month before I bother diving into the **bleep** which is the world of tech customer service. Especially when it seems to be a software issue, not a hardware one
Same problem with both my watch and my husband's. We both always got consistent, very good amounts of deep sleep. And then about a week ago, our measures dropped to just a few minutes each night. Nothing major has changed in our lives; we don't feel sleep deprived, even on the 0 minutes of deep sleep nights. I think Samsung wrecked it's software in its recent update. Now, I have to convince my husband that he's not on the brink of d eath because he's getting no deep sleep. . .
