Customers getting logged off after pressing button to order

[rommany]

Hello

 

Over the past week a lot of my customers but not all are getting logged off after they press the continue button in checkout confirmation page this can happen a few times before it takes them to the checkout success page.

 

I have done a few test orders myself but this never happens to me so I'm a little confused why some and not others?

 

I have done so many changes over the last few weeks i would not know where to start to stop this from happening.

 

Any ideas would be great :thumbsup:

 

My Online Store