Bossbar can't be changed with texture pack

RESOLVED! -> Boss bar splitted into multiple files

 

You can't change the bossbar texture in 1.20.2 (and latest snapshot 23w44a) (works in 1.20.1 with same world and same texture pack).

Steps to reproduce:

Texture pack with `assets/minecraft/textures/gui/bars.png` to something other than default texture bars.
Load that texture pack and create a visible bossbar

-> Doesn't show with the texture pack

 

Same steps, just in 1.20.1 it works as intended.

EDIT: Bug since snapshot 23w31a (included)