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.