I have the same problem, and this trick doesn’t fix it.
I have a sequence of 120 frames, I put it inside of another sequence as a “ShotTrack” and I want to apply a time scale of 0.8 on it. it works perfectly in the editor, but when I render in the movie render queue, it still renders 120 frames and it skips some frames. normally, 120 frames playing at a rate of 0.8 should render 150 frames. But it doesn’t.
Hope it’s possible to fix. or we’ll have to wait until 4.28 ><