Issue-3742

{}The given key 'EnemyAnimations' was not present in the dictionary{}_ after upgrading to netcode 2.6.0. happens when we try to send an rpc from SPAWNED network behaviour

Steps to reproduce:
The steps to reproduce: (v2.6 or v2.7)

• Create a generic project that includes

** NGO v2.6 or v2.6
* MP Tools (latest version is fine)
Create a scene.
* Add NetworkManager and disable scene management
Setup a player prefab
** In the player prefab make sure there is a NetworkBehaviour that invokes an RPC on another NetworkBehaviour on the player prefab (has to be 2 NetworkBehaviours)
** Make sure the RPC will be invoked immediately (i.e. SendTo.Owner will do this)
** Make sure the NetworkBehaviour that invokes the RPC is:
* Above the NetworkBehaviour that contains the RPC. (screenshot)
* The RPC is invoked during OnNetworkSpawn.

• Enter play mode
• Start as the host

Actual results: 

An exception will be thrown when the RPC is invoked.

Expected results: 

No exception should be thrown.

Reproducible with versions: 
v2.6.0 & v2.7.0

Not reproducible with versions: 
v.2.5.1 (and below)

Can’t test with versions: 

Environment: 
- OS: [Windows 11]
- Unity Version: [6000.2.9f2]
- Netcode Version: [2.6.0]
- Netcode Topology: [Client Server]

Notes:

A replication project has been added to this ticket and can be used to confirm the fix.