Coroutine not working on android build

I am using coroutines in my game as I like to take advantage of the “waitforseconds” feature and in the editor it worked perfectly however when I built and ran the game on my mobile device the coroutines are not working, does anyone know why this is happening and if there is a way to fix it?

Thanks!

I recommend More Effective Coroutines:

This free asset using less memory and is faster than standard coroutines. I haven’t any problem with it and it’s very easy to use.