Blazorise Version
2.1.1
What Blazorise provider are you running on?
Bootstrap5
Link to minimal reproduction or a simple code snippet
https://github.com/Megabit/Blazorise/tree/master/Demos/Blazorise.Demo.Bootstrap5
Steps to reproduce & bug description
Steps to reproduce & bug description
Open the Blazorise Bootstrap 5 demo with the SideMenu in collapsed mode.
Add or navigate to a page where the side menu contains enough items to exceed the visible height of the viewport.
Scroll down the collapsed side menu.
Bug 1: Instead of remaining in a single scrollable list, the menu items overflow into a separate visible section below the main menu area, creating a broken layout.
Open a side menu item that shows a submenu popup.
Try to move to a submenu option that is lower in the popup.
Bug 2: The submenu popup closes before the lower items can be accessed, making the submenu unusable in collapsed mode.
This happens consistently when the side menu is collapsed, including in the official Bootstrap 5 demo.
What is expected?
When the SideMenu is in collapsed mode, it should remain fully usable even when the number of items exceeds the available viewport height.
The menu should stay in a single, clean scrollable column.
Overflow items should not wrap into a separate broken-looking section.
Submenu popups should remain open while the user is interacting with them.
Users should be able to scroll and access all submenu items without the popup closing prematurely.
This behavior should work consistently in the Bootstrap 5 demo and in real applications.
What is actually happening?
When the SideMenu is collapsed, items that do not fit in the available vertical space overflow in a broken way, creating an extra visible section instead of staying inside one clean scrollable area.
Also, when opening a submenu popup, trying to reach lower submenu items causes the popup to close too early, so those items cannot be accessed properly.
This makes the collapsed side menu hard to use whenever the menu contains many items.
What browsers do you see the problem on?
Chrome, Microsoft Edge, Firefox
Any additional comments?
There is the image related to the bug 1
There is the link to the bug 2
https://github.com/Leandro-i2S/blazorise-sidemenu-issue/blob/main/2026-04-29%2010-41-46.mkv
Blazorise Version
2.1.1
What Blazorise provider are you running on?
Bootstrap5
Link to minimal reproduction or a simple code snippet
https://github.com/Megabit/Blazorise/tree/master/Demos/Blazorise.Demo.Bootstrap5
Steps to reproduce & bug description
Steps to reproduce & bug description
Open the Blazorise Bootstrap 5 demo with the SideMenu in collapsed mode.
Add or navigate to a page where the side menu contains enough items to exceed the visible height of the viewport.
Scroll down the collapsed side menu.
Bug 1: Instead of remaining in a single scrollable list, the menu items overflow into a separate visible section below the main menu area, creating a broken layout.
Open a side menu item that shows a submenu popup.
Try to move to a submenu option that is lower in the popup.
Bug 2: The submenu popup closes before the lower items can be accessed, making the submenu unusable in collapsed mode.
This happens consistently when the side menu is collapsed, including in the official Bootstrap 5 demo.
What is expected?
When the SideMenu is in collapsed mode, it should remain fully usable even when the number of items exceeds the available viewport height.
The menu should stay in a single, clean scrollable column.
Overflow items should not wrap into a separate broken-looking section.
Submenu popups should remain open while the user is interacting with them.
Users should be able to scroll and access all submenu items without the popup closing prematurely.
This behavior should work consistently in the Bootstrap 5 demo and in real applications.
What is actually happening?
When the SideMenu is collapsed, items that do not fit in the available vertical space overflow in a broken way, creating an extra visible section instead of staying inside one clean scrollable area.
Also, when opening a submenu popup, trying to reach lower submenu items causes the popup to close too early, so those items cannot be accessed properly.
This makes the collapsed side menu hard to use whenever the menu contains many items.
What browsers do you see the problem on?
Chrome, Microsoft Edge, Firefox
Any additional comments?
There is the image related to the bug 1
There is the link to the bug 2
https://github.com/Leandro-i2S/blazorise-sidemenu-issue/blob/main/2026-04-29%2010-41-46.mkv