diff --git a/src/lib/core.js b/src/lib/core.js
index de259b1b8..31acfbc95 100755
--- a/src/lib/core.js
+++ b/src/lib/core.js
@@ -4093,7 +4093,7 @@ export default function (context, pluginCallButtons, plugins, lang, options, _ic
          */
         _init: function (reload, _initHTML) {
             this._ww = options.iframe ? context.element.wysiwygFrame.contentWindow : _w;
-            this._wd = options.iframe ? util.getIframeDocument(context.element.wysiwygFrame) : _d;
+            this._wd = _d;
             if (options.iframe && options.height === 'auto') this._iframeAuto = this._wd.body;
             
             this._allowHTMLComments = options._editorTagsWhitelist.indexOf('//') > -1;
@@ -4150,8 +4150,16 @@ export default function (context, pluginCallButtons, plugins, lang, options, _ic
             this.history = _history(this, event._onChange_historyStack);
 
             // Init, validate
-            this._initWysiwygArea(reload, _initHTML);
+            if (!options.iframe) this._initWysiwygArea(reload, _initHTML);
             _w.setTimeout(function () {
+                // after iframe loaded
+                if (options.iframe) {
+                    this._wd = context.element.wysiwygFrame.contentDocument;
+                    context.element.wysiwyg = this._wd.body;
+                    this._initWysiwygArea(reload, _initHTML);
+                    if (options.height === 'auto') this._iframeAuto = this._wd.body;
+                }
+
                 this._checkComponents();
                 this._imagesInfoInit = false;
                 this._imagesInfoReset = false;
@@ -4810,8 +4818,8 @@ export default function (context, pluginCallButtons, plugins, lang, options, _ic
                         return false;
                     }
 
-                    if (!formatEl.nextElementSibling && !formatEl.previousElementSibling && (util.isWysiwygDiv(formatEl.parentNode) && util.isFormatElement(formatEl) && !util.isListCell(formatEl) &&
-                     (formatEl.childNodes.length <= 1 && (!formatEl.firstChild || util.onlyZeroWidthSpace(formatEl.firstChild.textContent))))) {
+                    if (!formatEl.previousElementSibling && (util.isWysiwygDiv(formatEl.parentNode) && util.isFormatElement(formatEl) && !util.isListCell(formatEl) &&
+                     (formatEl.childNodes.length <= 1 && (!formatEl.firstChild || util.onlyZeroWidthSpace(formatEl.textContent))))) {
                         e.preventDefault();
                         e.stopPropagation();
                         formatEl.innerHTML = '<br>';
@@ -4819,7 +4827,7 @@ export default function (context, pluginCallButtons, plugins, lang, options, _ic
                         while (attrs[0]) {
                             formatEl.removeAttribute(attrs[0].name);
                         }
-                        core.execCommand('formatBlock', false, 'P');
+                        core.setRange(formatEl.firstChild, 1, formatEl.firstChild, 1);
                         return false;
                     }
 
@@ -4841,7 +4849,8 @@ export default function (context, pluginCallButtons, plugins, lang, options, _ic
                                 }
                             }
 
-                            util.removeItem(selectionNode.parentNode);
+                            selectionNode.textContent = '';
+                            util.removeItemAllParents(selectionNode, null, formatEl);
                             offset = typeof offset === 'number' ? offset : prev.nodeType === 3 ? prev.textContent.length : 1;
                             core.setRange(prev, offset, prev, offset);
                             break;
@@ -4961,9 +4970,17 @@ export default function (context, pluginCallButtons, plugins, lang, options, _ic
 
                             if (util.onlyZeroWidthSpace(formatEl)) {
                                 util.removeItem(formatEl);
+                                // table component
+                                if (util.isTable(nextEl)) {
+                                    let cell = util.getChildElement(nextEl, util.isCell, false);
+                                    cell = cell.firstElementChild || cell;
+                                    core.setRange(cell, 0, cell, 0);
+                                    break;
+                                }
                             }
 
-                            if (util.hasClass(nextEl, 'se-component') || /^IMG$/i.test(nextEl.nodeName)) {
+                            // resizing component
+                            if (util.hasClass(nextEl, 'se-component') || /^(IMG|IFRAME)$/i.test(nextEl.nodeName)) {
                                 e.stopPropagation();
                                 if (util.hasClass(nextEl, 'se-image-container') || /^IMG$/i.test(nextEl.nodeName)) {
                                     nextEl = /^IMG$/i.test(nextEl.nodeName) ? nextEl : nextEl.querySelector('img');
@@ -4972,6 +4989,7 @@ export default function (context, pluginCallButtons, plugins, lang, options, _ic
                                     core.selectComponent(nextEl.querySelector('iframe'), 'video');
                                 }
                             }
+
                             break;
                         }
                     }
diff --git a/test/dev/suneditor_build_test.js b/test/dev/suneditor_build_test.js
index 05e1d0c88..90098973e 100644
--- a/test/dev/suneditor_build_test.js
+++ b/test/dev/suneditor_build_test.js
@@ -206,16 +206,27 @@ window.sun_destroy1 = function () {
 }
 
 window.sun_create1 = function () {
-    s1.destroy();
-    s1 = suneditor.create('editor', {
-        plugins: [align, plugins.link],
-        buttonList: [['align', 'link', 'bold', 'underline', 'italic', 'strike', 'removeFormat', 'codeView']],
-        width: '100%',
-        height: 'auto'
-      })
+    // s1.destroy();
+    // s1 = suneditor.create('editor', {
+    //     plugins: [align, plugins.link],
+    //     buttonList: [['align', 'link', 'bold', 'underline', 'italic', 'strike', 'removeFormat', 'codeView']],
+    //     width: '100%',
+    //     height: 'auto'
+    //   })
+}
+
+s1.onKeyDown = function (e, core) {
+    const keyCode = e.keyCode
+    const ctrl = e.ctrlKey || e.metaKey || keyCode === 91 || keyCode === 92;
+    if (ctrl && keyCode === 187) {
+        e.preventDefault();
+        const anchor = core.util.getParentElement(core.getSelectionNode(), core.util.isAnchor)
+        if (anchor) {
+            window.open(anchor.href)
+        }
+    }
 }
 
-
 let ss = window.ss = suneditor.create(document.getElementById('editor1'), {
     // lang: lang.ko,
     plugins: plugins,
@@ -273,7 +284,7 @@ let ss = window.ss = suneditor.create(document.getElementById('editor1'), {
 // ss.setContents('fsafsa')
 ss.onload = function (core) {
     console.log('onload', core);
-    core.focus();
+    // core.focus();
 };
 ss.onScroll = function (e) {
     console.log('onScroll', e);