The action_from_value method in the DwellActionsGenerator compares the absolute value of the dwell_centre with the absolute value of the target_value. This can result in the wrong action being produced if the negative of the target value sits between the initial dwell and the target dwell.

E.g. A sensor has a dwell of -1. A task is created to make this sensor look at a dwell of 0.5. The resulting task would be produced to look at -0.5 (if the resolution of the generator produced a value sufficiently close to -0.5)