1. Version of Adobe InDesign:

All versions of Adobe InDesign 2024 and 2025, from version 19.0 to version 20.0.
2. Steps to Reproduce the Issue:

Open Adobe InDesign (versions 19.0 to 20.0).
Create a new document.
Insert Arabic text that includes diacritics (tashkeel) on the first letter.
Apply full justification to the text.
Use variable text features with the Arabic text.
Export the document to PDF for printing.
3. Expected Result:

The first letter of the Arabic text should appear correctly in the exported PDF, even when it has diacritics and is fully justified.
4. Actual Result:

The first letter disappears in the exported PDF when the text is fully justified and the first letter has diacritics.
The issue does not appear in the InDesign preview; it only occurs after exporting to PDF.