Sometimes the subtitles are blank

I am on YouTube Korea, and I find that often the subtitles are translated selectively. Some are just missing I can’t figure out why. The above image is taken from the video: (Kor, Zh-Tw) 죽고 싶어도 떡볶이 먹을 수 있어요 | 백세희 '죽고 싶지만 떡볶이는 먹고 싶어' 저자 | 우울 위로 감정 | 세바시 1260회 - YouTube

But this happens quite frequently with Korean to English translations.

Thank you!