Mixing standard and embedded Helvetica font does not work

[blikblum]

Bug Report

Description of the problem

A document with both embedded and standard font does not work. It creates a corrupt document. Docs with only embedded, works

Code sample

var fs = require('fs');
var PDFDocument = require('pdfkit');

var doc = new PDFDocument();
doc.registerFont('HelveticaCustom', './Helvetica.ttf');

doc.pipe(fs.createWriteStream('mixed-helvetica.pdf'));

// comment line below to make work
doc.text('standard')

doc.font('HelveticaCustom');
doc.text('embedded')

doc.end();

Your environment

• pdfkit version: 0.17.2
• Node version: 22
• Browser version (if applicable):
• Operating System: Windows