sounds will not hear in build in some levels

I have a SoundManager controlling all sounds and musics in game.
sound manager will stay in all levels.
every thing is okey but in next 3 or 4 levels no sound will hear.I checked in editor that all sounds that are playing have a volume they are 2D and 3D I have checked all things but not working.
BUT WHEN I 1) PAUSE GAME IN EDITOR AND PLAY AGAIN
2) CHANGE WINDOW AND CHANGE BACK TO GAME IN BUILD VERSION
all sounds start playing!!!
I have this problem in editor , build(window and full)
any one have an advice???

How many Audio Sources are playing at once? Over 32, and different sources will get priority (some will not be heard).

So you unchecked the 3D sound checkbox that’s good. Have you checked that audiosource on the gameobject? Make sure that its volume is up and that you have it playing 360 to it can be heard from everywhere.