I have discovered one or more pulled threads in my wrap. Is that bad?
No, a thread pull is primarily only a visual defect and the sling can be used without any concern. But if you know how, these can be easily fixed.
https://www.didymos.de/en/FAQ/Materials-and-Properties/I-have-discovered-one-or-more-pulled-threads-in-my-wrap.-Is-that-bad