My browser / operating system: Windows NT 10.0, Chrome 85.0.4183.83, No Flash version detected

So I've been using sounds for this scratch OS of mine
and then suddenly when i went back to sounds, the sounds, sounded quieter
i don't know whats causing this but this has been happening to me for a long time, scratch keeps lowering the sound volume until to the point it becomes silence and i have to find the sound that i used to import it again
And i wasn't even using any sound effect blocks

Please help