Microsoft Forms – users submitting form without filling in required fields

The fields are definitely marked as required on the form and appear with an asterisk.

I am unable to replicate the problem. When I try to submit a form it flashes up a warning message saying 'The question is required'.


I guess some users submitted without Form fill in normal way.
In another words,they use selemium/python to hand on information rather than manually, which result bypass the front required validation.