The Bug
The portal travel sound no longer plays when entering an End portal. It does plays when entering a Nether portal but not an End portal.
How to reproduce
Create a Nether portal and pass through it
-> ✔ the sound is played
Create an End portal and pass through it
-> ❌ the sound isn't played
Partially fixed ! Only the main end portal was fixed, the exit end portal still occur, so I create a new ticket : MC-272796