off duty casts

hi, im always curious to know when the character is "absent" for a few episodes it may mean they are off duty attending to personal functions/earrands in their real life. Such as when Adi and Priya told to go on a so called honeymoon, they were actually off to get married in their hometowns. Recently we've seen Adi and Priya off to delhi for studies and Jaggi and Imli too were off for a few episodes recently. What could have been brewing whene they are not acting?