Im having the same issue. When I uncheck/check this box, the same thing happens when I try and export the data to 12d or CAD. Linework, points and other data simply disappear
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Christopher Pepping
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Original Message:
Sent: 01-15-2019 02:44
From: Carsten Merkel
Subject: Re: Export Issue
Hi Carl,
I experienced somthing similar. Try to go to "Project Settings". Open the point "Feature Code Processing"
There try to check or uncheck the "Allow editing of processed feature codes...."

My problem was, when i tried to eksport, the feature codes was processed ones again and all edits disappeard.
Good luck.
Carsten