Eway payment received but Virtuemart order isn't confirmed

Receiving this same issue report from multiple clients:
They receive a payment receipt from Eway, however the message isn't getting back to Virtuemart and the order status just remains as pending.
I don't think it happens all of the time, which makes me think it might be a timeout issue.
Any thoughts?

Hello,

Not really sure what could be causing that. If it is not happening everytime, then I would guess there is some miscommunication between the site and eway and certain intervals.