Thai language export to PDF vs Print to PDF, diacritics are garbled

[johanj13161865]

Helping out a customer here with some Thai language issues.

I have a very simple file containing just a few Thai words (see attached).

If I use "Export" in InDesign 16.2.1, the PDF is visually fine but the diacritics ("accents") are garbled and/or duplicated if you try to copy/paste.

If I use "Print to Adobe PDF" instead, the file is perfect.

Of course, the simple solution could in theory be to print to PDF, but if other parts of the artwork workflow relies on Export, we don't really want to go there.

Is there a solution to this or is this just how InDesign works? Thinking it probably has similar issues with other scripts....

thanks

Johan

[johanj13161865]

The latest update from Adobe is that they want to close my ticket without an ETA on solution, nor do they want to tell us the root cause. And this is almost 2 years since it was reported. Frustrating.