bug(MultiSelect): can't close popup window when in validate form

[ArgoZhang]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

can't close popup window when in validate form

Expected Behavior

No response

Steps To Reproduce

No response

Exceptions (if any)

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.NET Version

No response

Anything else?

No response

[bb-auto]

@ArgoZhang Thank you for filing this issue. In order for us to investigate this issue, please provide a minimalistic repro project that illustrates the problem.