The music is not manually paused, however, automatically paused. This happens because the Redmi Buds 6 Pro can slide out of the ear canal due to movement or other reasons. When the earbuds are not properly seated in the ear, they are unable to detect that they are being worn, which causes them to automatically pause the music.
To resolve this issue, wear the earbuds properly again, ensuring they are securely in place. Afterward, you can restart the music to resume playback. This should restore the listening experience.