in magento 1 when you were editing a customer (so in a screen with multiple tab like, customer account, address, comments, order, ...)
If on was containing a wrong format value or a missing mandatory value while you wre on a other tab an trying to save, the tab was highlighted in red and so you knew you had an error.
Now in magento 2 it seems not working, you just can't save.
Can you add this feature please?
(in community up to date M2 edition)