Contact Form 7 – required fields not working

Hi, I have a contact form on my site, these are the fields of my contact form:
[text* text-99 placeholder “??? ????”]
[tel* text-381 placeholder “?????? ???”]

the thing is that the form always passes the validation, even if i leave the fields empty. The thing is the tel validation is working and gives an error is the value isn’t a tel number, but the require validation isn’t working
What might be the problem and how can I fix that?

Thanks,
Matan