Reproduction steps:
1) Open attached project
2) Open scene "Main"
3) Enter play mode
4) Press the "A" key on the keyboard rapidly
--- You should hear a distinct sound playing, every time you hit the key
--- audioSource.time = 36.40f is called
5) Build for WebGL and run
6) Press the "A" key on the keyboard rapidly
--- You should hear a different sound
--- Audio skips to a slightly earlier time