When I click on the CheckBox's label, "Select All," the dropdown closes. While if I click the TelerikCheckBox itself, it remains open.

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TELERIK EDIT

Possible workarounds include:

• Wrap the clickable UI in the MultiSelect HeaderTemplate in an element with a tabindex attribute: https://blazorrepl.telerik.com/mfOlnvFk40G8PElJ33
• Cancel the MultiSelect OnClose event conditionally: https://blazorrepl.telerik.com/QpYvxvla44M3nsdp57