JQuery mobile application returns to first page on update

JQuery mobile application returns to first page on update

I have created a single page application with two pages. This is used with hand held android barcode scanner devices that we use in our warehouse. The user scans a location tag on a shelf. This causes an ajax call to check that this is a valid location. If location is valid code moves to the barcode scan page. On this page we scan item barcodes. Each scan causes an ajax call to our back end and retrieves data on the item. This all works, except that after each ajax call the application returns to the first page.  I can't see why this occurs. When I test this application on my desktop browser it functions as I would expect.