I have an older Rans Stratus, and have over 9000 miles on it. I have found it to be very stable for minor bumps and pavement interruptions. The Stratus, as as long-wheel base recumbant, has a light front wheel, and so in fine gravel it tends to skid a bit. But in other situations, where you would in an upright be close to off-balancing, it handles very nicely. Because of the low center of gravity, it is more stabe in many of these situations than an upright bike, which has a much higher center of gravity. Being made of steel, and with the long-wheel base feature, the bike also absorbs bumps quite well. I do deload my back by leaning harder against the seat, and lifting my rear off the seat pan, when there is a big bump. My backrest, and upper back then takes the bump and not my lower back and spine.
John