Weird physics interraction with small objects

Hello all!

I am learning UE4 and is exploring the c++ part of the engine. Currently I’m following the C++ Battery Collector series from UE
and I’m on part 10 of the series. When I play around with the scene, I discovered this weird behavior between my character and the small batteries as recorded here - YouTube (I tried with larger battery and it behave normally). I’ve been searching around for a way to fix it but no luck. I would like to know if there is away to fix it. Any help is appreciated!

Code for the Pickup.cpp class

// Fill out your copyright notice in the Description page of Project Settings.

#include "BatteryCollector.h"
#include "Pickup.h"

// Sets default values
 	// Set this actor to call Tick() every frame.  You can turn this off to improve performance if you don't need it.
	PrimaryActorTick.bCanEverTick = false;

	// All pickups start active
	bIsActive = true;

	// Create the static mesh component
	PickupMesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("PickupMesh"));
	RootComponent = PickupMesh;


// Called when the game starts or when spawned
void APickup::BeginPlay()

// Called every frame
void APickup::Tick( float DeltaTime )
	Super::Tick( DeltaTime );


bool APickup::IsActive() {
	return bIsActive;

void APickup::SetActive(bool PickupState) {
	bIsActive = PickupState;

void APickup::IsCollected_Implementation(){
	// Log a debug message
	FString PickupDebugString = GetName();
	UE_LOG(LogClass, Log, TEXT("You have collected %s"), *PickupDebugString);