Reproduction steps:
1. Open the attached “repro-project“
2. Open the “Assets/AstarPathfindingProject/ExampleScenes/Scenes/InfiniteWorld/InfiniteWorld.unity“ scene
3. Enter Play Mode
4. Observe the crash

Reproducible with: 2023.3.0b8, 2023.3.0b9
Not reproducible with: 2021.3.35f1, 2022.3.20f1, 2023.2.12f1, 2023.3.0b7

Reproduced on: Windows 10
Not reproducible on: No other environment tested

Note: Could not test the Player due to Build completing with a result of 'Failed'

First few lines of the stack trace:
0x00007FFB462DCFF9 (Unity) CharacterController::Create
0x00007FFB462DB85F (Unity) CharacterController::AwakeFromLoad
0x00007FFB46529617 (Unity) AwakeFromLoadQueue::InvokePersistentManagerAwake
0x00007FFB4652A799 (Unity) AwakeFromLoadQueue::PersistentManagerSingleQueueAwakeFromLoad
0x00007FFB4652A2AD (Unity) AwakeFromLoadQueue::PersistentManagerAwakeFromLoad_NoChecks