Doesnt stay on when display turned off

I use this app to sleep at night. Before the update I would let the app run all night long. Now I have to leave the phone on all night. Ill just turn it over so the displays brightness wont bother me, but what an oversight! Did they do this on purpose? I hope its just a bug so it will get fixed. If the developers thought this was a good idea, they better be reading these reviews. Please bring back the original function allowing this app to run in the background and while the display is off!!!

m.jakub about Sleepmaker Storms Free, v6.0