In the Fitness Tab, if you set values from the graphs to be displayed “right” (default is “top”), no values are shown in Android with Chrome. In Windows (Chrome) this works.
It works only on the default fitness graph with CTL, ATL and Form.
There’s another bug report on this - the values can be seen below the charts. I see this with several browsers on my MacBook Pro, Chrome on my Android Phone , and Safari on an iPad.