I can confirm. What op didn’t mention is that going through the Nether for the very first time in a world does play the portal travel sound while the dimension loads. However, every other time after that, the portal travel sound does not play until the dimension is fully loaded.
Provided attachment to show an example of me entering the Nether for the very first time on a superflat world.
This isn’t invalid. Should be reopened. Could also be considered a parity issue as Bedrock edition has the travel sound play as the world is loading in just like Java edition prior to 1.3.
I can confirm. What op didn’t mention is that going through the Nether for the very first time in a world does play the portal travel sound while the dimension loads. However, every other time after that, the portal travel sound does not play until the dimension is fully loaded.
Provided attachment to show an example of me entering the Nether for the very first time on a superflat world.