Subtitle's keep disappeared on Samsung TV's Apple TV+ app

On the Apple TV+ app for Samsung Smart TVs, subtitles are disappeared within a couple of minutes since shows start.

Whenever it's disappeared, "down arrow->subtitles->select any other random language->select back to the original language" temporary fixes the issue but it goes away again in a couple of minutes.

Please do not ask me to do "disabling the subtitles and enabling them again". I have seen the same answers on every subtitle issue questions but it doesn't fix the issue at all.