What could cause a page to load differently when it is in debug mode?

I am trying to fix the following webpage. It should show a info bubble and a flag marker at the same spot, but in Chrome, it only shows the info box (not the flag). When I reload the page in chrome's debug counsel (break at line 60 then execute the rest--I didn't make any changes) the the page loads correctly (shows both the info box and the marker).

http://geotours.heliohost.org/mobile/junk-geoloc.html
Notes
  • It seems to work fine in IE
  • I did try clearing the cache in chrome (Options->clear cache, Shift F5, and Control F5)

Thanks