### Bug Description The Select All checkbox is not checked when items are grouped ### Affected Component ui5-multi-combobox ### Expected Behaviour The checkbox Select All is checked ### Isolated Example https://ui5.github.io/webcomponents/nightly/packages/main/test/pages/MultiComboBox.html ### Steps to Reproduce 1. Open https://ui5.github.io/webcomponents/nightly/packages/main/test/pages/MultiComboBox.html 2. Go to "Select all with groups" sample 3. Open the picker and press "Select All" checkbox 1. The checkbox is not checked 2. The focus outline is not ok ( it only wraps the text - not the whole row) ### Log Output, Stack Trace or Screenshots https://github.com/user-attachments/assets/51fc813c-3b42-4694-a33e-c85194cbecb6 ### Priority Medium ### UI5 Web Components Version 2 ### Browser Chrome ### Operating System Windows ### Additional Context _No response_ ### Organization _No response_ ### Declaration - [x] I’m not disclosing any internal or sensitive information.
Bug Description
The Select All checkbox is not checked when items are grouped
Affected Component
ui5-multi-combobox
Expected Behaviour
The checkbox Select All is checked
Isolated Example
https://ui5.github.io/webcomponents/nightly/packages/main/test/pages/MultiComboBox.html
Steps to Reproduce
Open https://ui5.github.io/webcomponents/nightly/packages/main/test/pages/MultiComboBox.html
Go to "Select all with groups" sample
Open the picker and press "Select All" checkbox
The checkbox is not checked
The focus outline is not ok ( it only wraps the text - not the whole row)
Log Output, Stack Trace or Screenshots
Screen.Recording.2026-06-18.192408.mp4
Priority
Medium
UI5 Web Components Version
2
Browser
Chrome
Operating System
Windows
Additional Context
No response
Organization
No response
Declaration