Stop charging screen blank in 3.7

Hi Locus Team, I notice that (currently with 3.7..1) if I stop charging my screen does not blank out for power saving as has always done in previous versions. Have it set in 'specific' actions to do so. If I start the app without charging, it works blanking the screen after xx secs. Then once USB charging connected, screen comes back to life as normal, however removing charging again, it no longer defaults back to screen blank.

Any info please?