Thanks for the suggestions! I have attempted conflicts testing with no change. For some reason I didn’t think about curl being my server so thank you for that direction.
I did find some random 500-700 Ms delays on server with max execution time of only 30. Increasing this limit has resolved the issue for now. Time to deal with hosting, thanks for the help and for the awesome plugin!
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This reply was modified 3 years, 5 months ago by kryptkeepr.
the issue was a timeout error being saved in wp_options, cleared this and it rescanned without issue.