SC Johnson Ziploc 1 Gallon Freezer bags Review

One Gallon ZIPLOK Freezer Bags with double seal.  I use them to ice my sore knees but when the ice melts the bags leak most of the water out.  This seems to be a recent phenomena - don't recall it from years ago.  And this is leaking from the bottom - I have checked this with the bags totally upright (seal at the top)