Sleep score graphs don't keep up. When I look at the graph for deep sleep, for example, there's a vertical line showing how much sleep I've gotten compared to the recommended amount, but the blue horizontal line isn't there. (venu2s).
No answer yet, I have the same problem, and I may help by
showing some pictures for clarity.
The below picture shows the incorrect view on Garmin Connect, Android OS.

And this is the same event, correctly shown on Web browser.

Incorrect view is shown on Android OS only, iOS is fine.
There are 3-4 months it happen. It is strange there is no reaction from Garmin to fix it.