Scheduled posts vanish from Facebook the moment they should go live

[RicLeP]

Not sure where the issue lies but when I schedule a post on Facebook I can view it in their planner, but the moment it’s meant to be published, it disappears instead of going live.

$this->scheduledPublishTime is a future date, more than 10 minutes away and less than 30 so allowed in their rules.

From my understanding scheduled posts need to have their published status as false.

public function toFacebookPoster($notifiable): FacebookPosterPost
{
    return (
        new FacebookPosterPost(
            $this->vacancy->title . "\r\n"
            . $this->vacancy->company->name . "\r\n" . "\r\n"
            . html_entity_decode(strip_tags($this->vacancy->description)) . "\r\n" . "\r\n"
            . $this->vacancy->link . "\r\n"
        )
    )->withParams([
        'scheduled_publish_time' => $this->scheduledPublishTime->unix(),
        'published' => 'false'
    ])->withLink($this->vacancy->link);
}

I’m also awaiting a callback from Facebook which may shed light on where the issue is.