Text Background Opacity doesn't work for actionbar text

The latest beta has fixed the Text Background Opacity for hotbar text (MCPE-79331), however, it hasn't been fixed for actionbar text.

How To Reproduce
1. Go to Settings -> Accessibility tab.
2. Set the Text Background Opacity to any amount of opacity (0%-100%).
3. Ride a horse/boat/minecart or other mountable.
4. Pay attention to the actionbar text.

Observed Results:
Opacity doesn't change.

Expected Results:
Opacity should change.