Elytra flying subtitle is not displayed when actually flying

The bug

24w44a fixed MC-177084. However, while the subtitles appear when using playsound to play the associated sound event, the subtitle does not appear in practice when flying.

How to reproduce

1. Equip an elytra and start gliding

2. /playsound minecraft:item.elytra.flying

Expected results

In both cases, the new subtitle would be displayed.

Actual results

It plays with the command but not when actually flying.