diff --git a/zkdoc/release-note b/zkdoc/release-note
index f1d20fb2b2..b4277a77be 100644
--- a/zkdoc/release-note
+++ b/zkdoc/release-note
@@ -47,6 +47,7 @@ ZK 10.1.0
   ZK-5825: Clicking bandbox button on Android does not focus input
   ZK-5833: ZK-423 regression on Android
   ZK-4960: Listbox doesn't keep scrollbar position when applying hflex="min" on a listheader in mobile
+  ZK-4961: Unable to scroll in grid and listbox when using non-native scrollbar on mobile
 
 * Upgrade Notes
   + Remove Htmls.encodeJavaScript(), Strings.encodeJavaScript(), Strings.escape() with Strings.ESCAPE_JAVASCRIPT, and replace them with OWASP Java Encoder APIs instead.
diff --git a/zul/src/main/resources/web/js/zul/grid/Grid.ts b/zul/src/main/resources/web/js/zul/grid/Grid.ts
index e537f446ab..316d95be89 100644
--- a/zul/src/main/resources/web/js/zul/grid/Grid.ts
+++ b/zul/src/main/resources/web/js/zul/grid/Grid.ts
@@ -250,11 +250,8 @@ export class Grid extends zul.mesh.MeshWidget {
 	override onSize(): void {
 		super.onSize();
 		var canInitScrollbar = this.desktop && !this._nativebar;
-		// refix ZK-2840: only init scrollbar when height or vflex is set in mobile
 		if (!this._scrollbar && canInitScrollbar) {
-			if (!zk.mobile || (zk.mobile && (this.getHeight() || this.getVflex()))) {
-				this._scrollbar = zul.mesh.Scrollbar.init(this); // 1823278: should show scroll bar here
-			}
+			this._scrollbar = zul.mesh.Scrollbar.init(this); // 1823278: should show scroll bar here
 		}
 		setTimeout(() => {
 			if (canInitScrollbar) {
diff --git a/zul/src/main/resources/web/js/zul/sel/Listbox.ts b/zul/src/main/resources/web/js/zul/sel/Listbox.ts
index 23d74dee52..d7ba9fae3d 100644
--- a/zul/src/main/resources/web/js/zul/sel/Listbox.ts
+++ b/zul/src/main/resources/web/js/zul/sel/Listbox.ts
@@ -196,11 +196,8 @@ export class Listbox extends zul.sel.SelectWidget {
 	override onSize(): void {
 		super.onSize();
 		var canInitScrollbar = this.desktop && !this.inSelectMold() && !this._nativebar;
-		// refix ZK-2840: only init scrollbar when height or vflex is set in mobile
 		if (!this._scrollbar && canInitScrollbar) {
-			if (!zk.mobile || (zk.mobile && (this.getHeight() || this.getVflex()))) {
-				this._scrollbar = zul.mesh.Scrollbar.init(this); // 1823278: should show scrollbar here
-			}
+			this._scrollbar = zul.mesh.Scrollbar.init(this); // 1823278: should show scrollbar here
 		}
 		setTimeout(() => {
 			if (this.desktop) {