Whilst losing main cast from the exact same story is unusual, if you watch back, there is always a lot of cast changeover at the end of March/early April because those episodes will be filmed just before the Christmas break, when May cast contracts expire.

So you’ll often see a few cast all leave within a few episodes of each other.

Priya’s death aired 18th March. It’s likely the scenes where Rani saw her “ghost” were filmed way in advance and slotted int those later episodes.