lex freeze when debugging

helloWorld.js

import { LightningElement, track  } from 'lwc';
import ResourcesC from '@salesforce/resourceUrl/CoveoV2__searchUi';
import { loadScript, loadStyle } from 'lightning/platformResourceLoader';

/*
CoveoV2 resources can be found at
https://docs.coveo.com/en/319/javascript-search-framework/downloading-the-javascript-search-framework
OR http://productupdate.coveo.com/?product=coveo-search-ui

*/
const main_html = `<div id="search" class="CoveoSearchInterface" data-design="new" data-enable-history="false" data-auto-trigger-query='false'>

                        <div class="coveo-tab-section">
                            <a class="CoveoTab" data-id="All" data-caption="All Content"></a>
                        </div>
                        <div class="coveo-search-section">
                            <div class="CoveoSearchbox"></div>
                        <div class="coveo-main-section">
                            <div class="coveo-results-column">
                            <div class="CoveoResultList">
                                <script id="mySimpleResultTemplate" class="result-template" type="text/underscore">
                                <div class="CoveoResultLink"></div>
                                </script>
                            </div>
                            </div>
                        </div>
                        </div>`;

export default class HelloWorld extends LightningElement {
    @track error;
    @track stack;

    coveoInitialized = false;

    errorCallback(error) {
        this.error = error;
        console.log(this.error)
    }
    renderedCallback() {
        if (this.coveoInitialized) {
            return;
        }
        this.coveoInitialized = true;
        console.log('rendering renderer')
        // initialize component
        Promise.all([
            loadScript(this, ResourcesC + '/js/CoveoJsSearch.min.js'),
            loadStyle(this, ResourcesC + '/css/CoveoFullSearchNewDesign.css'),
            loadScript(this, ResourcesC + '/js/templates/templatesNew.js')



        ]).then(() => {
                const container = this.template.querySelector('.container');
                container.innerHTML = main_html;
                this.initCoveo();
            }).catch(error => {
                console.log(error)
            });     
        }
        connectedCallback(){
            console.log('connectedCallback');
        }
        initCoveo(){
            console.log('initing coveo');
            const cardTemplate = `<div class="coveo-result-frame">
                                <div class="coveo-result-row">
                                    <div class="coveo-result-cell" style="padding-left:15px;">
                                        <div class="coveo-result-row">
                                            <div class="coveo-result-cell" style="font-size:18px;">
                                                <a class="CoveoResultLink" >
                                                </a>
                                            </div>
                                        </div>
                                    </div>
                                </div>
                                    <div class="coveo-result-row">
                                </div>
                            </div>`;

        Coveo.TemplateCache.templates = {};

        Coveo.TemplateCache.registerTemplate("card-default", Coveo.HtmlTemplate.fromString(cardTemplate, 
        {
            "condition": null,
            "layout": "card",
            "mobile": null,
            "role": null
        }), true, true);
            Coveo.SearchEndpoint.configureSampleEndpoint();
            const root = this.template.querySelector(".CoveoSearchInterface"); 
            Coveo.init(root);
        }
    
}

helloWorld.js-meta.xml

<?xml version="1.0" encoding="UTF-8"?>
<LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata" fqn="helloWorld">
  <apiVersion>45.0</apiVersion>
  <isExposed>true</isExposed>
  <targets>
    <target>lightning__AppPage</target>
    <target>lightning__RecordPage</target>
    <target>lightning__HomePage</target>
    <target>lightningCommunity__Page</target>
    <target>lightningCommunity__Default</target>
  </targets>
</LightningComponentBundle>

hellowWorld.html

<template>
        <div class="slds-m-around_medium">
            <div class="container" lwc:dom="manual"></div>
        </div>
</template>