Rejection notifications

Hi, bit of a noob here but I've had a couple of 4K clips marked as "scheduled for processing" disappear after a couple of days from my uploads dashboard.

Is this because they were rejected or tech glitch. Would I get a notification if it was rejected & why?

Thanks

They are probably in the limbo of processing. I m almost always notified by e-mail whether work is accepted or rejected. Should be soon either way.
Larry