I have not seen this behavior with my Epson 2400 and this paper.
What size paper are you printing?
Are you storing the paper in the box upright or flat? If upright it might have developed a slight bow or curl.
Also, are you using the regular top feeder or the one for single sheets of thicker paper (I use the latter)?
Just a final reply, Thanks Paul for the single sheet feeder tip for thicker papers that did the trick. It usually takes several attempts at feeding the paper in, but it works