diff --git a/docs/index.js b/docs/index.js
index fceecda..f69349a 100644
--- a/docs/index.js
+++ b/docs/index.js
@@ -414,16 +414,4 @@ quill2.setContents([
   { insert: '25' },
   { attributes: { 'table-up-cell-inner': { tableId: '8v36875pbr6', rowId: 'fow0uajprzw', colId: 'y0epsy6odnm', rowspan: 1, colspan: 1 } }, insert: '\n' },
   { insert: '\n' },
-
-  // TODO: balance table loop
-  // { insert: '\n' },
-  // { insert: { 'table-up-col': { full: false, width: 583 } } },
-  // { insert: { 'table-up-col': { full: false, width: 583 } } },
-  // { attributes: { 'table-up-cell-inner': { rowspan: 1, colspan: 1 } }, insert: '\n' },
-  // { attributes: { 'table-up-cell-inner': { rowspan: 1, colspan: 1 } }, insert: '\n' },
-  // { attributes: { 'table-up-cell-inner': { rowspan: 1, colspan: 1 } }, insert: '\n' },
-  // { insert: 'blockquote' },
-  // { attributes: { 'blockquote': true, 'table-up-cell-inner': { rowspan: 1, colspan: 1 } }, insert: '\n\n' },
-  // { attributes: { 'table-up-cell-inner': { rowspan: 1, colspan: 1 } }, insert: '\n' },
-  // { insert: '\n' },
 ]);
diff --git a/src/formats/table-col-format.ts b/src/formats/table-col-format.ts
index 27322b7..4025060 100644
--- a/src/formats/table-col-format.ts
+++ b/src/formats/table-col-format.ts
@@ -122,6 +122,10 @@ export class TableColFormat extends BlockEmbed {
     const tableColgroup = findParentBlot(this, blotName.tableColgroup);
     tableColgroup.align = this.align;
 
+    if (this.next != null && this.checkMerge()) {
+      this.next.remove();
+    }
+
     super.optimize(context);
   }