Hey David
That is really strange, when I inspect the element also it does not show any height being manually set…
One thing to notice is, perform a search, refresh the page manually, then carry on searching, and you will see this problem does not happen… really strange!
I just did a little test, and resizing the window will automatically resize this area properly, so maybe you could try forcing a window resize once the results are loaded?
I just did a test and it seemed to work, do something like this in your JS:
$(".searchandfilter").on("sf:ajaxfinish",function(){
jQuery(window).resize();
});
Its a bit hacky but it seems that the height doesn’t auto calculate when we load the results, so forcing the browser to resize (only the event not actual dimensions) should trigger the right actions in your theme.
Let me know if that works?