FIX: The output PDF file with PDF/A-1a or PDF/A-1b was not compliant.
KB-20180614-01
Version
XFRX 18.1 and earlier
Symptoms
The text in the output file had weird background colour if the output file had PDF/A compliance.
Cause
Text use OTF font and Backstyle was transparent.
Work arround
Set Backstyle to opaque and background color white.