Radoslav Isakov, writing over at Stage 32, had this to say about perspective in a screenplay:

POV isn’t a stylistic choice. It’s a structural decision about access — who gets to see, who gets to know, and how reality is interpreted at any given moment. The moment you shift that access, you’re not just adding information — you’re altering the conditions under which meaning is formed.

At first, multiple perspectives can feel like expansion. The world becomes richer, the narrative seems broader, and the story gains apparent depth. But without control, that expansion starts to work against the story. Tension depends on limitation — on what is withheld, misunderstood, or only partially seen. The more freely perspective moves, the more that pressure begins to leak.

Read more at:
https://www.stage32.com/lounge/screenwriting/When-Perspective-Breaks-a-Story-Without-You-Noticing