Go to wordpress settings, permalinks, and set the permalink to any option except for “post name”.
Make sure you set your permalinks in wordpress.
I have the same issue. When I make a test change to text or widget, etc. My changes dont show up right away. I disabled my WP cache and then cleared my browser cookies and content and sometime it shows up and sometimes it does not. Very frustrating. I cant believe I would have to clear my cookies and cache every time I make a change and need to preview the change. Is there another way or plugin that I can use so change I make in my admin section will show up right away on my site?