My Pixel watch 2 only show sleep patterns not sleep stage

[Paulene_p]

I use Pixel watch 2 for a month it was working completely fine until this two weeks. All my sleep stages are gone. At first I do understand that I was slept too short (only few hours) so it make sense that I might not get sleep stage but after that my sleep stage never come back for two weeks already. It only show my sleep pattern and this make me nervous. (like I'm in bed for nine hours but sleep only 5 hours+ or worse than that everyday) 

I read that it might me the strap but I also didn't change anything. Please help

[RiekoC]

Hello @Paulene_p 

I moved your post from the Sleep Well forum to the Android platform forum, which is the one used for Pixel Watch issues. 

This help page has the recommended troubleshooting steps to try when you don't see your sleep stages (<-- click link). 

Please let us know if any of the troubleshooting helped. 

[Amanda_W_]

Is sleep sensitivity set to sensitive?
Is your band set 1-3 finger widths above your wrist?
Do you have any heart rhythm or blood pressure issues?
Could you be dehydrated? (this affects your blood volume)
I have this problem when I have slept too little, extra badly, or it had difficulty detecting my heart rate. When it doesn't know your heart rate it is more confused about whether or not you are asleep. In that mode it doesn't seem to count "restless" sleep into your asleep total at all. Like the 5/9 you've mentioned. I need a lot of sleep- I would feel it if I really had slept as little as it counted in that mode, so I deeply take those numbers with a grain of salt. 
I do have some non-dangerous heart issues, so sometimes it doesn't detect a certain kind of weak/early beat. I will get low heart rate notifications and my sleep tracking will go into the mode you're talking about. It does that other times too though, when my heart isn't being weird! Don't feel worried about your heart based on that-- it is highly unlikely. I only mention it because if you have any health issues they could contribute.
Good luck finding a fix. It is annoying, but try not to worry.