i wanted to set a new behance password, but it refuses any password containing the letter "a" a bit inconvenient...

I forgot my behance password, clicked on reset password to set a new one. The password reset page opened up, I wrote the new password i wanted, as i did so the red requirements turned green one by one except “password does not contain your name or email adress” which it did not. I tried other variations, none changed that specific marker, finally i wrote gibberish and it accepted it, tried adding my own password and

when i hit the letter “a” that requirement went back to red. So i tried it without the letter a and it worked until i wrote the letter “c” which had the same effect. I tested the rest of the alphabet didn’t find any other problem. It happens no matter the placement of those letters and whether they are capitalised or not.
I remember having this problem the first time I created my account too 3-4 years ago.

TL;DR
Setting up a new behance password, letters “a” and “c” make the password invalid. ( *ne contient pas votre nom ou adresse e-mail )