How to handle collission end in arcade physics

Phaser 3
1

Hello. I have a problem : i dont know how to handle collision end in arcade physics. I need to show icon, when player overlap with game object, so i tried this :

create() {
    this.physics.add.overlap(this.player,this.obj,()=>{
        this.objCollide = true;
    });
}

update() {
    if(this.objCollide){
        this.icon.setAlpha(1);
    }else{
        this.icon.setAlpha(0);
    }
}

It works, but when i collide with obj, icon starts flicker, because update set alpha 0, but then after millisecond set alpha 1. I dont like this flicker effect. So how i can do something like that : this.physics.add.overlapEnd(this.player,this.obj) ?