Time scale changes to 0 by itself

Okay so I keep changing my time scale to 1 manually and when i enter the play mode, everything runs on the time scale 1. but when i exit the play mode, the time scale is changed to 0 as if there was a poltergeist controlling my computer. It happens only in this one scene, because when i create a new scene, the time scale stays 1 after i exit the play mode.