LB->Onboard->I-9 Form->Not accept date of birth when it enter using keyboard

Environment:LB
Browser: chrome
Login: Partner
1.Login as Partner
2.Home->Company home->Employee Home->Onboard->I-9 Form
3.Enter date of birth using keyboard in proper format

Actual result: Not accept date of birth when it enter using keyboard
Expected Result: Date of birth should be accepted.