sorry this got me a little mad but he did not miss that part, if you look at the lyrics on the screen it says 동네를 but in official lyrics and how hweseung sings it in his remake it’s 동넬 which is a common process to words you connect with 을/를 grammatically, just like in another part of the lyrics before this that says 향기를 but he sang it (like hweseung did) as 향길. so i assume that is also what’s in his music sheet. i replayed 0:49 part so many times and i can tell he articulates 동넬 with his tongue in the alveoral consonants but it’s also because of his accent. he did not miss anything, hope this helps i just dont want to reply to the op but i hope you tell them this https://x.com/notsoautumn/status/1806731751810834525?s=46&t=xH5CR7fmaj-a6UdiGHV4Jw