When time remapping is controlled by a parameter passed with a master propery, video works fine, but audio time remapping is disregarded.
The demo project is attached. There's generated audio which is passed along with animation into the TEST comp both directly and with intermediate time remapped precomp. You can see that the audios are always identical although changing the "time shift" master property does shift the animation.
All AE versions, Windows
I am not able to attach a thing on this forum, thats why the google drive link https://drive.google.com/open?id=1mneBCG6XD3SpGM8D8jjRJdiei15I-1uW