Export to PDF changes position of glyphs
Dear all,
I have a urgent, showstopping issue with my upcoming publication.
Many glyphs get misplaced during the PDF exporting phase from InDesign, while they look good in every previous step. Here are the details.
I have created the musical score in the notational software Dorico. Look at how the notehead, the stem, and the flag of the note are well placed and they look like a single object:

This is just an example, but the 30-pages long score is full of this, as you can imagine.
In Dorico they look like the above picture, and they look the same in the PDF exported via Dorico and opened in Preview or Acrobat. They even look perfect when placed in the InDesign document.
When I use the Export feature to generate the print-ready PDFs from InDesign (this applies to any preset I have tried, both PDF-X/3:2003 which the printer requires, and the Press Quality for digital download), the result is this:

Look how now, the stem (the vertical line) doesn't align with the flag and the notehead.
I cannot send these files like this to the printer, nor can I publish these online in this state.
I have cross-posted on the Dorico private forum for the developers to see if this tells them anything.
Please, help me find what is going on.
As stated, this is a show-stopping issue, and I need to send this to the printer plus publish it online ASAP.
Thank you
ADDENDUM:
Worked with Adobe Support via chat, with a less than pleasing computer sharing experience.
They couldn't find what was wrong. Knowing that I had successfully managed this same workflow less than a month ago, I tried to resort to the Apple-way and placed SVGs instead of the PDF—the SVG being exported from AI 2023—. It worked ... the issue is gone. Still, I would like to know what could it be, since the Dorico PDF renders well on every screen and app I've tried, before failing during Adobe PDF export.
