Actionbar text opacity stuck at 100% and is not affected by accessibility settings

When I set my text background opacity to any number, any actionbar text is stuck at 100% background opacity. Tested with the "You can sleep only at night and during thunderstorms" message and an actionbar title

To reproduce: 

1. Right click a bed during day time and check actionbar (change text background opacity to less than 100%) OR 
2. Execute an actionbar title command.