Hmm, sounds like a hitbox issue. Why don’t you try one of these methods?
https://create.roblox.com/docs/reference/engine/classes/WorldRoot#GetPartsInPart
https://create.roblox.com/docs/reference/engine/classes/WorldRoot#GetPartBoundsInRadius
https://create.roblox.com/docs/reference/engine/classes/WorldRoot#GetPartBoundsInBox
Or