BUG ? French translation no more complete after upgrade

Hi there,
I’m on wp 4.2.2.
After upgrading to CF7 4.2 some of the french translation are no more available.

It’s about :
“required field is empty”
“This input is too long.”
“This input is too short.”

I upgrade to CF 4.2.1 but these 3 messages are still missing by default.

Note that, the form was previously build with the default translation as default value. I didn’t change them to custom translation.

Now I have to change them manually.
Does anyone have the same problem ?

https://www.ads-software.com/plugins/contact-form-7/