Recruitment mask did not work

Hi,

I would like to change the mask in Recruitment but it did not work, does anyone knows how to solve it?

best regards
SB

Can confirm that setting a customized number doesn’t work in my Dolibarr 14.0.0 neither. Probably it would be best to report this problem on GitHub: https://github.com/Dolibarr/dolibarr/issues