Simple ECS/DOTS collision system not working

Hey. I am new to ECS, specially the latest package versions, and I am facing difficulties getting even a simple collision detection system to fire properly. All I want to do is detect a collision with a console message and even that seems to be beyond me. The code below compiles fine and it's an adaption of some older examples I found, using the "new" SystemBase instead of the JobComponentSystem. However, when I shoot my projectiles all over the scene and see them hit (and bounce of) my targets, no console message shows up. At this point I am little frustrated with this, so please any help or comment you could provide, would be most welcomed. Thanks in advance.

 using UnityEngine;
 using Unity.Jobs;
 using Unity.Entities;
 using Assets.ACS.Scripts.DataComponents;
 using Unity.Transforms;
 using Unity.Mathematics;
 using Unity.Physics;
 using Unity.Physics.Systems;
 using Unity.Burst;
 
 namespace Assets.ACS.Scripts.Systems
 {
 
     [UpdateInGroup(typeof(FixedStepSimulationSystemGroup))]
     [UpdateAfter(typeof(ExportPhysicsWorld))]
     [UpdateBefore(typeof(EndFramePhysicsSystem))]
     public partial class ACS_CollisionSystem : SystemBase
     {
         BeginInitializationEntityCommandBufferSystem ecbSystem;
         BuildPhysicsWorld buildPhysicsWorldSystem;
         StepPhysicsWorld stepPhysicsWorldSystem;
 
         protected override void OnCreate()
         {
             ecbSystem = World.GetOrCreateSystem<BeginInitializationEntityCommandBufferSystem>();
             buildPhysicsWorldSystem = World.DefaultGameObjectInjectionWorld.GetOrCreateSystem<BuildPhysicsWorld>();
             stepPhysicsWorldSystem = World.DefaultGameObjectInjectionWorld.GetOrCreateSystem<StepPhysicsWorld>();
 
             RequireForUpdate(GetEntityQuery(new EntityQueryDesc
             {
                 All = new ComponentType[] { typeof(ACS_ProjectileData) }
             }));
         }
 
         [BurstCompile]
         private struct CollisionEventJob : ICollisionEventsJob
         {
             public void Execute(CollisionEvent collisionEvent)
             {
                 Debug.Log("Collision");
             }
         }
 
         protected override void OnStartRunning()
         {
             base.OnStartRunning();
             this.RegisterPhysicsRuntimeSystemReadOnly();
         }
 
         protected override void OnUpdate()
         {
             // Schedule physics check
             Dependency = new CollisionEventJob().Schedule(stepPhysicsWorldSystem.Simulation, Dependency);
         }
     }
 }