I'm not sure if this is related, but are you running ASIO on both 2023 and 2024 simultaneously?
Try Musocity's suggestion, freeze the tracks in 2023, save the song with a new name, shut down 2023 and start 2024, load the song and see how it performs.
Also, in the video (which is useful) you did not generate the song in 2024, just double-clicked the first bar. If you unfreeze and generate does it solve anything?
That link wants me to download an exe file. I was expected a BiaB song file, and not expecting to download a program file that I know nothing about. I didn't proceed.