Thanks for the pointer. However, I'm not programmatically showing the table. It's rendered up front and should be visible (the shown panel is only part of another, always visible panel, which is part of the html body). If the Renderer thinks otherwise, that'd be a bug, too.
In the issue there is also the solution (workaround) :
this.normalPartStyle.display = "none";
You should be able to do that using a jQuery function. However, maybe the table will hide and after your function it will show, then there will be an undesirable blinking on you page. =(