Fix avatar arm pointing to wrong direction after scene reload or teleport

### Build version
Not specified

### Issue Description
After pointing in a direction, if the user reloads the scene or teleports to another place and returns, the avatar's arm continues pointing in the wrong direction instead of tracking the correct target.

### STR (Steps to Reproduce)
1. Open the app
2. Cast a line (enable pointing)
3. Point to a specific location
4. Reload the scene, or teleport to another place and return to Genesis Plaza
5. Observe the avatar's arm direction

### Expected Result
The avatar's arm should point in the correct direction that the user is targeting.

### Actual Result with evidence
The avatar's arm points to an incorrect/stale direction instead of the intended target after the scene reload or teleport.

### Reproduction
Intermittent (2/10)

### Operative system and additional Notes
Windows

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Reported by daf
Requested by Dawid Krajewski (<@U079GRD9WTZ>)

No file or test is named. First reproduce the intermittent issue by enabling pointing, reloading the scene or teleporting away and returning to Genesis Plaza, then trace how the avatar's pointing direction is preserved across those transitions. Done means the arm tracks the current target correctly after both a scene reload and a teleport.

Written by the indexing model from the issue text.