Why do I sometimes get a blank page

Why do I sometimes get a blank page

I move between two pages using one of the following:

$.mobile.changePage("ScheduleCleanDetailsV2Entry.html", { data: { SchedIndex: data_schedindex, AreaIndex: data_areaindex, LetterIndex: data_letterindex, RoadIndex: data_roadindex, CleanIndex: data_cleanindex } , allowSamePageTransition:true, reloadPage:true});

$(":mobile-pagecontainer").pagecontainer("change","ScheduleCleanDetailsV2Entry.html", { data: { SchedIndex: data_schedindex, AreaIndex: data_areaindex, LetterIndex: data_letterindex, RoadIndex: data_roadindex, CleanIndex: data_cleanindex } });

They both work most of the time.

But sometimes I get a blank page.

I have removed all of the javascript associated with the new page but still sometimes get a blank page.

If I leave minimal javascript in (i.e. a couple of alerts) they work

Nothing appears in console when running in a browser.

Help! this is driving me nuts!