AEM As Cloud | Mandatory fields not working when there are multiple tabs?

Hi Team

    I am facing an issue. I wanted to check if this is a product bug (which I think it is) with you all before going ahead with my conclusion. The issue is , when a component has multiple tabs and there are mandatory fields in the non-active (the one which is not open) ; if the author submits the dialog without authoring anything , he will be able to submit it. 

Actual :- The dialog gets submitted ,  in spite of mandatory fields marked on the other tabs

Expected :- The dialog should not get submitted unless the mandatory fields are entered.

If any One have any solution please let me know.

Thanks,

Naveen