GCM 4.20 on a Pixel 2 phone running Android 9. I frequently notice that the last seven days activities as reported on the GCM home screen are incorrect and inconsistent with the details reported when I go to the activity screen (which shows the correct values). See these two screenshots, taken a few seconds apart - the home screen shows two rides totalling 138.9km over the past seven days, the activity screen shows four rides totalling 264km over the same period. The latter is the correct number of rides.