Xiaomi Watch 2 Pro - Sensor continuous fire

Hi,

A customer of mine has noticed a strange behavior with his watch in combination with my watch faces.
Watch faces created with WFS (in my case 1.5.7) use the heart rate sensor permanently (permanently green flashing LED on the back of the watch), even if the watch face does not use a heart rate complication or a heart rate tag expression. Even if he has switched off the heart rate measurement on his watch.
When he changed the watch face to another watch face (not Wfs?), it stopped flashing.

In his case, this leads to a significantly shorter battery life.

Since the behavior has only occurred with the “Xiaomi Watch 2 Pro” so far, I wanted to find out if you have had similar reports?