Uploaded subtitles not updating when replaced on Stream

I am trying to replace a subtitle VTT file on a video on stream due to some typos. However, after I replace the VTT file by removing the previous subtitles and uploading the updated VTT file(update video details>subtitles>edit), the new subtitles are not updated on the video when refreshed. 

Why are the updated subtitles not reflecting on Stream after replacing them?