Why does lazy loading load all js files to the client?

Question

Angular

app.routing.module.ts file

const routes: Routes = [

  
 { path: '', loadChildren: () => import('./threads-lazy/threads-lazy.module').then(m => m.ThreadsLazyModule) },
 { path: 'thread/:guid', loadChildren: () => import('./thread-lazy/thread-lazy.module').then(m => m.ThreadLazyModule) },

];

When forming a bundle, the output files are 5.js and 6.js.
When you go to the main page, only 5.js should be loaded, but for some reason 6.js is also loaded, which has nothing to do with it.

Where is the error?

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';

import { ThreadLazyRoutingModule } from './thread-lazy-routing.module';
import { ThreadComponent } from './thread/thread.component';


@NgModule({
  declarations: [ThreadComponent],
  imports: [
    CommonModule,
    ThreadLazyRoutingModule
  ]
})
export class ThreadLazyModule { }

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { ThreadComponent } from './thread/thread.component';


const routes: Routes = [
  {
    path: '', component: ThreadComponent
  }
];

@NgModule({
  imports: [RouterModule.forChild(routes)],
  exports: [RouterModule]
})
export class ThreadLazyRoutingModule { }