Spellcheck marking correctly spelled words as incorrect
Using the most current version of CC ID
I always have dynamic spelling turned on, and my dictionary is set to English USA, however, some files appear to have flagged correctly spelled words as incorrect, while other files appear to be normal. Screenshot examples, 'Dark' and 'Inspiration'.
The issue seemed to come on randomly
Saving as IDML does not fix the issue, nor does restarting the program

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Gerald Davenport commented
CC ID v20.0.1 says the sustainability is incorrectly spelled. checked it in dictionary, online, and fellow workmates to confirm it is spelled correctly.
Not in dictionary as spelled wrong and it does not give the correctly spelled version as an option to choose.