Export to PDF intermittent bug Indesign 18.2.1
Hi,
I have encountered an intermittent bug while exporting to PDF, 5 out of 30 times it corrupted some of the fonts in the document. It was not consistent which font it messed up and when exported again the error was gone. A couple examples of the output below. System is Win 10, more than ample RAM and HD space. We did not encounter this problem with any of the previous version of INDD.
Is this a known bug, is there a fix in process?


We create very large multilingual manuals and IFUs, for a vast catalogue of products. Any help would be greatly appreciated.
Thanks,
Michael