I’m not sure that the function’s order may influence.
And when I delete this line,it’s right.
I can’t reproduce this. I’ve used Unity 2019 and 2017, and FMOD 2.00.01. Try creating a blank Unity project with a fresh integration asset and see if the error still persists.
If it doesn’t work then I’d try other Unity and FMOD versions. Worst case scenario, just don’t use 2.00.00.