Welcome to the forum! Real nice trailer!
I checked the specs on Forest River's site...this trailer is listed as 2515lbs dry pin weight. Depending how much you loaded in the trailer and where, the actual pin weight might be closer to 3000lbs. That's a lot of weight for your F250...you may be close or even over the rear axle rating. I'm not sure what the GCWR rating is for your F250 (20,000?)...with the trailer's dry weight of 12,295 and GVWR of 16,195lbs you may also be over that. You should get your set-up scaled to see where you are weight-wise.
Hopefully our 5th wheel owners will provide more info. If the rear suspension is dropping 3 inches, you may be onto the bump stops on rough pavement. The air bags will help that situation.
Nights camped in 2013 - 55, 2014 - 105, 2015 - 63