Titles are no longer faded when text background opacity is enabled in the accessibility settings

The Bug

Titles are no longer faded when Text background opacity is enabled (= not set to 0%) in the accessibility settings menu.
(Plus, since the 19w12a snapshot, you must set the "Text Background" on "Everywhere").

Titles no longer faded.mp4

How to reproduce

Type the following commands in order and by enabling (= not set to 0%) and disabling (= set to 0%) the background opacity of the text in the accessibility options (or set "Text Background" on "Everywhere" and "Chat") :

/title @a times 70 10 70
/title @a title "Test"