Not really a bug, but it should be changed anyway.
While you run, you jump longer distance with long jump module than with regular walking. I think this is unfair to players who don’t use “always run” option because it’s very impractical to quickly press Shift, Ctrl, Space and W all with one hand. I suggest deleting this increased sprint jump distance. It’s a minor issue in current release, but I suppose it will be significant once in Xen.