When using with A/B split test emails, both variants are sent to the contact

[vexersa]

Issue: If there is a cron expression on a "send email to contact" event set to send an email with A/B variants, both variants are sent to the contact.

Reproduce: Create a campaign with a "send email to contact" event set to send an email with A/B variant. Put a contact through the campaign. Both emails will be sent to the contact.