Have a Giant Reign 2 with a Marzocchi Bomber 600TST2 fork that isn't the least bit smooth. It builds a load then releases like the fork is sticking. It's done this since I got it new and the LBS says this isn't a problem, does this with the rebound at all settings so that shouldn't be the problem. When I let all the air out and pump it up it takes in air but doesn't rise as I pump, it jumps as it builds pressure. My rear shock rises smoothly as I pump air in and I feel the fork should do the same.
One problem it's causing is every time I get off the bike when setting the sag it's a different measurement, rear is spot on each time.