Crosshair no longer shows up in spectator mode when looking at entities

The bug

In previous updates, when looking at most (MC-46621) entities in spectator mode, the crosshair would show up. This is no longer the case. When looking at interactable blocks, the crosshair still shows up.

How to reproduce

1. Jump into spectator mode
2. Look at an entity of your choice
   → The crosshair doesn't show up

Example

Here is an example in video: The cursor is no longer displayed when you point a mob in spectator mode.mp4