Readonly attribute on a component for a job system causing freezing editor in play-mode.

Hello,

I have written this system and experience a weird behavior. Before I missed the [ReadOnly] attribute on the NavMeshAgentGetter. Everything ran fine. Now I added the [ReadOnly] attribute as you can see below. But whenever this system starts to run (a destination exists) the editor freezes totally forever.

The reason is the read-only attribute but it makes total sense to have that. Has anybody an idea what the freeze could cause?

Code (CSharp):

1. public class NavMeshAgentVelocityToAnimationSystem : JobComponentSystem {
2.  
3.         [RequireComponentTag(typeof(Destination))] // only run if entity has a destination
4.         [BurstCompile]
5.         private struct SetVelocityJob :IJobForEach_BC<AnimatorKeyValueIntFloatBufferElement, NavMeshAgentGetter> {
6.  
7.             public int AnimatorIdMovementSpeed;
8.  
9.             public void Execute(DynamicBuffer<AnimatorKeyValueIntFloatBufferElement> buffer, [ReadOnly] ref NavMeshAgentGetter navMeshAgentGetter) {
10.                 buffer.Add(new AnimatorKeyValueIntFloatBufferElement {
11.                     Key = AnimatorIdMovementSpeed,
12.                     Value = math.max(0.1f, math.length(navMeshAgentGetter.Velocity))
13.                 });
14.             }
15.         }
16.        
17.         protected override JobHandle OnUpdate(JobHandle inputDeps) {
18.  
19.             var job = new SetVelocityJob
20.             {
21.                 AnimatorIdMovementSpeed = AnimatorIds.MovementSpeed
22.             };
23.             return job.ScheduleSingle(this, inputDeps);
24.         }
25.     }