Unable to add a child or trigger depends drops after Open enrollment

Summary:

When adding a new born Child after open enrollment, Employee plus family option not visible.

Open Life Event Processed Date = 1/1/24

Add a child LE processed date = 2/2/24

2/2/24 processed add a child LE, evaluation window started, when trying to enroll employee only option is available and Employee plus family option not available.

Checked the Family Member Rule "Check Designation Requirements".

Checked designation requirements train-stop, and make sure the designate dependents action item is present and a dependent change rule for the life event.

Other plans which employees didn't enrolled also not visible. 

Please advise.

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