Hanging at Checkout - Sort of

When the payment is being processed - sometimes - (2 out 8 test orders so far) I get a page saying Placing the Order - Please be Patient and it just hangs in there placing the order.

However, the emails are generated saying the order has been placed and they make it to the back end order page.

I think this might perplex/perturb customers and prompt them to contact for clarification even if they do get an email confirming their order, wasting their time and mine.

I’ve done a search on the forum and come up with references to this but no explanation as to why or what to do to resolve it. It was once suggested that it might be because the server is busy but as was pointed out in by one of the gurus that’s not the problem.

What do you recommend?