Thank you for reaching out to the Community. I apologize for the experience you are having with our Subject Line A/B test feature. At the moment, we are aware that some A/B test emails are stuck in active and not sending. We are currently working on a fix with this, and you will be contacted by email with anymore updates. Again, I apologize for the inconvenience and I hope you have a wonderful rest of your weekend.
Zoe_H Community & Social Media Support
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