Product review (3 stars): Clean UNDER filter before purchasing new filter and filter cover.
Was all set to order new filter and filter cover after reading reviews.  I too was having issues with the filter not fitting in properly and catching items as they were tumbling. Was not sure if I needed to buy the filter cover so took it all apart before ordering.  The issue was that there was so much lint BELOW the filter that it was popping it out of its housing.  After I cleaned the lint out it fit fine again.  So I think the problem is a design flaw on LG's part.  The lint filter does not trap as completely as it should allowing some of the lint to gather below the filter instead of in it.  And yes I do clean my filter after every load.  Am going to keep an eye on it as I now know that the problem is the lint under the filter causing the issue.  Also am guessing this also could lead to a problem with the lint blocking the vent which would not be good.