From 66ef0a5686a5b1fe6774e2a2528c12e905241a16 Mon Sep 17 00:00:00 2001
From: Cagatay Civici <cagatay.civici@gmail.com>
Date: Mon, 17 May 2021 17:43:23 +0300
Subject: [PATCH] Fixed #1247 -

---
 src/components/datatable/DataTable.vue | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/components/datatable/DataTable.vue b/src/components/datatable/DataTable.vue
index 1212f448d6..a94830764d 100755
--- a/src/components/datatable/DataTable.vue
+++ b/src/components/datatable/DataTable.vue
@@ -388,7 +388,7 @@ export default {
         }
     },
     mounted() {
-        if (this.scrollable && this.scrollDirection !== 'vertical') {
+        if (this.scrollable && (this.scrollDirection !== 'vertical' || this.rowGroupMode === 'subheader')) {
             this.updateScrollWidth();
         }
 
@@ -409,7 +409,7 @@ export default {
             this.saveState();
         }
 
-        if (this.scrollable && this.scrollDirection !== 'vertical') {
+        if (this.scrollable && (this.scrollDirection !== 'vertical' || this.rowGroupMode === 'subheader')) {
             this.updateScrollWidth();
         }
     },