Wojciech Pietranik added to the database. You can submit the change request yourself for the first page to give it a try.
BTW, technically it is not a bug
Before being able to select an engraver, his name has to be in the database. Creating new engravers is not available to users so we don't get various letterings for a same name and this also allows to link engravers to a presentation text, weblink and a picture when available.
Few names displayed on the pages are there because they were already mentioned before the functionality was implemented and we didn't want to lose this data. So they are here but not fully in the database hence such cases as this one.
If you spot other cases like this, let me know and we'll add them.
For further engravers things like this one, please simply open a ticket and select "suggesting the introduction for an engraver". There you can simply give the name of the engraver, link to its Wikipedia page in English and French and link to a picture (
example here). Other links than Wikipedia can be accepted if reliable and stable enough.
Sapientiae plerumque stultitia est comes.
Si c'est un grand plaisir d'être reconnu par ses amis, c'est peut-être encore plus flatteur d'être reconnu par ses adversaires.
Be yourself; everyone else is already taken.