diff --git a/client/src/loader.js b/client/src/loader.js
index 79628d7b63..643dd2ef98 100644
--- a/client/src/loader.js
+++ b/client/src/loader.js
@@ -76,8 +76,10 @@
         this._internalModuleListIsSet = false;
         this._bundleFileMap = {};
         this._bundleMapping = {};
-        /** @type Object.<string, string[]> */
+        /** @type {Object.<string, string[]>} */
         this._bundleDependenciesMap = {};
+        /** @type {Object.<string, boolean>} */
+        this._bundleIsLoadedMap = {};
 
         this._addLibsConfigCallCount = 0;
         this._addLibsConfigCallMaxCount = 2;
@@ -507,7 +509,7 @@
                 if (name in this._bundleMapping) {
                     let bundleName = this._bundleMapping[name];
 
-                    this._addBundle(bundleName).then(() => {
+                    this._requireBundle(bundleName).then(() => {
                         let classObj = this._getClass(name);
 
                         if (!classObj) {
@@ -606,11 +608,15 @@
          * @param {string} name
          * @return {Promise}
          */
-        _addBundle: function (name) {
+        _requireBundle: function (name) {
+            if (this._bundleIsLoadedMap[name]) {
+                return Promise.resolve();
+            }
+
             let dependencies = this._bundleDependenciesMap[name] || [];
 
             if (!dependencies.length) {
-                return this._addBundleInternal(name);
+                return this._addBundle(name);
             }
 
             return new Promise(resolve => {
@@ -618,7 +624,7 @@
 
                 Promise.all(list)
                     .then(() => {
-                        return this._addBundleInternal(name);
+                        return this._addBundle(name);
                     })
                     .then(() => resolve());
             });
@@ -629,7 +635,7 @@
          * @param {string} name
          * @return {Promise}
          */
-        _addBundleInternal: function (name) {
+        _addBundle: function (name) {
             let src = this._bundleFileMap[name];
 
             if (!src) {
@@ -656,7 +662,11 @@
             return new Promise(resolve => {
                 document.head.appendChild(scriptEl);
 
-                scriptEl.addEventListener('load', () => resolve());
+                scriptEl.addEventListener('load', () => {
+                    this._bundleIsLoadedMap[name] = true;
+
+                    resolve();
+                });
             });
         },
 
diff --git a/frontend/bundle-config.json b/frontend/bundle-config.json
index c1cb2934da..6cbf11cf04 100644
--- a/frontend/bundle-config.json
+++ b/frontend/bundle-config.json
@@ -107,7 +107,7 @@
             "templatePatterns": [
                 "client/modules/crm/res/templates/**/*.tpl"
             ],
-            "allPatterns": [
+            "lookupPatterns": [
                 "client/modules/crm/src/**/*.js"
             ]
         },
@@ -119,8 +119,8 @@
             "dependentOn": [
                 "lib!Summernote"
             ],
-            "libs": ["Summernote"],
-            "allPatterns": [
+            "requiredLibs": ["Summernote"],
+            "lookupPatterns": [
                 "client/modules/crm/src/**/*.js"
             ]
         },
@@ -132,8 +132,8 @@
                 "lib!Flotr",
                 "lib!espo-funnel-chart"
             ],
-            "libs": ["Flotr", "espo-funnel-chart"],
-            "allPatterns": [
+            "requiredLibs": ["Flotr", "espo-funnel-chart"],
+            "lookupPatterns": [
                 "client/modules/crm/src/**/*.js"
             ]
         },
@@ -144,8 +144,8 @@
             "dependentOn": [
                 "lib!full-calendar"
             ],
-            "libs": ["full-calendar"],
-            "allPatterns": [
+            "requiredLibs": ["full-calendar"],
+            "lookupPatterns": [
                 "client/modules/crm/src/**/*.js"
             ]
         },
@@ -156,8 +156,8 @@
             "dependentOn": [
                 "lib!vis"
             ],
-            "libs": ["vis"],
-            "allPatterns": [
+            "requiredLibs": ["vis"],
+            "lookupPatterns": [
                 "client/modules/crm/src/**/*.js"
             ]
         },
@@ -174,7 +174,7 @@
     "modulePaths": {
         "crm": "client/modules/crm"
     },
-    "allPatterns": [
+    "lookupPatterns": [
         "client/src/**/*.js"
     ]
 }
diff --git a/js/bundler-general.js b/js/bundler-general.js
index 7460a2a302..124bedff5e 100644
--- a/js/bundler-general.js
+++ b/js/bundler-general.js
@@ -36,14 +36,14 @@ class BundlerGeneral {
      *   chunks: Object.<string, {
      *     files?: string[],
      *     patterns?: string[],
-     *     allPatterns?: string[],
+     *     lookupPatterns?: string[],
      *     templatePatterns?: string[],
      *     noDuplicates?: boolean,
      *     dependentOn?: string[],
-     *     libs?: string[],
+     *     requiredLibs?: string[],
      *   }>,
      *   modulePaths?: Record.<string, string>,
-     *   allPatterns: string[],
+     *   lookupPatterns: string[],
      *   order: string[],
      * }} config
      * @param {{
@@ -97,7 +97,7 @@ class BundlerGeneral {
 
             let bundleFile = this.filePattern.replace('{*}', name);
 
-            let libs = this.config.chunks[name].libs;
+            let libs = this.config.chunks[name].requiredLibs;
 
             if (libs) {
                 let part = JSON.stringify(libs.map(item => 'lib!' + item));
@@ -150,9 +150,9 @@ class BundlerGeneral {
         let params = this.config.chunks[name];
 
         let patterns = params.patterns;
-        let allPatterns = []
-            .concat(this.config.allPatterns)
-            .concat(params.allPatterns || []);
+        let lookupPatterns = []
+            .concat(this.config.lookupPatterns)
+            .concat(params.lookupPatterns || []);
 
         let bundledFiles = [];
         let bundledTemplateFiles = [];
@@ -171,7 +171,7 @@ class BundlerGeneral {
             let data = bundler.bundle({
                 files: params.files,
                 patterns: patterns,
-                allPatterns: allPatterns,
+                lookupPatterns: lookupPatterns,
                 libs: this.libs,
                 ignoreFiles: ignoreFiles,
                 dependentOn: params.dependentOn,
diff --git a/js/bundler.js b/js/bundler.js
index a7d588513c..917c8f4370 100644
--- a/js/bundler.js
+++ b/js/bundler.js
@@ -57,7 +57,7 @@ class Bundler {
      * @param {{
      *   files?: string[],
      *   patterns: string[],
-     *   allPatterns?: string[],
+     *   lookupPatterns?: string[],
      *   ignoreFiles?: string[],
      *   dependentOn?: string[],
      *   libs: {
@@ -79,7 +79,7 @@ class Bundler {
             .concat(this.#obtainFiles(params.patterns, params.files))
             .filter(file => !params.ignoreFiles.includes(file));
 
-        let allFiles = this.#obtainFiles(params.allPatterns || params.patterns);
+        let allFiles = this.#obtainFiles(params.lookupPatterns || params.patterns);
 
         let ignoreLibs = params.libs
             .filter(item => item.key && !item.bundle)
@@ -229,7 +229,7 @@ class Bundler {
 
         let modulePaths = modules.map(name => {
             if (!moduleFileMap[name]) {
-                throw Error(`Can't obtain ${name}. Might be missing in allPatterns.`);
+                throw Error(`Can't obtain ${name}. Might be missing in lookupPatterns.`);
             }
 
             return moduleFileMap[name];