Version 3.1-1 Accelerometer stopped working on Toshiba X20W-D, worked fine in 3.0-1

With version 3.1-1, the accelerometer stopped working on my Toshiba X20W-D 2-in-1 convertible. It worked fine in 3.0-1 (Arch Linux). So no automatic screen rotation any more.

When entering gdbus introspect --system --dest net.hadess.SensorProxy --object-path /net/hadess/SensorProxy, the difference to the previous version is:

readonly s AccelerometerOrientation = 'undefined';

whereas before it was

readonly s AccelerometerOrientation = 'normal';

(or another orientation).

Reverting to the previous version restores the functionality.