The topic rendering disappears and won't come back until a change is made when you hide/show the search results.
Fixed in build 201308021513 https://github.com/pressgang-ccms/PressGangCCMSUI/commit/2593bfa279d227f8495aff2843138c1a3c595bf8 The show/hide results panel no longer causes the whole view to re-initialise which means that the rendered view will continue to show any content without being reloaded.