Semaphore.waitforsignal causes slow framerate

The game I’m working on is, well, a pretty big game, but no matter what scene I am in, even virtually empty scenes, semaphore.waitforsignal is causing my game to drop to 5 fps, please help

I’m going crazy CZ of this issue, man my game is so simple, a flappy bird style, all working fine on android devices but only devices with 1.5 GB RAM still getting hiccups frames from time to time…