Waiting for information that is being sought from the user, please see below.
The Adobe ID Team
Do you face the issue only when you export to PDF X1/X3 or with a standard set? Please try exporting with the default High Quality Preset or PDF X4 preset, and share the results.
Also, it would be great if you can share the files with us at firstname.lastname@example.org. It will help us debug the issue.
Thank you for reporting the issue.
We are currently investigating the problem.
I opened the image in Photoshop, added another transparent background layer, then merged the two layers and finally placed the image in InDesign solved the problem.
The issue is due to the Kerning being set as None, if one sets it as Optical or Metrics, it solves the issue. The issue is currently under review.
Thanks for sharing the document. I am able to reproduce the issue at my end as well. I will investigate further as to what is causing the issue.
Thanks for providing this information!
Is this specific to a single documents or with all the documents you are using that were created in the earlier versions of InDesign?
If possible, please share a few documents (created in earlier versions and use to load styles,etc.) with which you see these issues at email@example.com, this will help us debug the issue you are facing.
As mentioned by Reyna, the issue is now resolved.
Fix of the issue is now available in InDesign’s latest November’17 update.
Please upgrade to the latest version InDesign CC 13.0.1 for the fix.
If you are unable to see the update, go to Creative Cloud application and click on the context menu on the top right and click on Check for App Updates.
Could you please check if the preference of Check Links Before Opening Document is checked or not in Edit > Preferences > File Handling.
Also, make sure this setting is not being migrated from your InDesign CC 2017 (Version 12.0) setting are not being migrated to Version 13.0 preferences. If so, you will have to trash preferences of earlier versions as well along with Version 13.0 preferences and then launch InDesign 13.0 with the default settings, ensure that the preference Check Links Before Opening Document is checked or not in Edit > Preferences > File Handling in ON, now open your file and click on Update Links if the dialog is shown, try exporting your PDF.
Did you try deleting the InDesign preferences, cache and the plist file?
Please try after deleting the "com.adobe.InDesign.plist" file at ~/Library/Preferences along with the Adobe InDesign preferences folder.
Using you files, I am able to export a high quality PDF using InDesign CC 2018.
Did you specify some compression settings, color profiles conversion, or are the links on network? Please share the PDF presets that you used.
Also, did you try exporting the PDF after trashing the InDesign preferences and cache?