Music Remixer doesn't work on fast playforward/playback

In the Edit page, Music Remixer doesn't kick in when fast playing/playing back (l/j) a track. This creates some confusion, especially when eliminating an instrument completely. I understand that speeding up playback is not for accurate audio checkup, but I think it still is noteworthy.

I still get out-of-phase audio in fast speeds. This one isn't surprising to me.

It's common for intensive real-time effects to only work during normal speed playback. Perhaps rendering the effect may help?