Rancher 420 IRS

Just got a new 420 IRS and am curious if anyone has had any issues with them? I’m new to the DCT and fuel injection. My last utility was a the old indestructible 300 4X4. One thing I noticed with this one was when going down a hill with a steep grade letting it hold back in 1st gear, the throttle surged a little up and down with my thumb off of it. Is this normal on the new fuel injections? Anyone else seen this before?

Rancher 420 IRS

Just got a new 420 IRS and am curious if anyone has had any issues with them? I’m new to the DCT and fuel injection. My last utility was a the old indestructible 300 4X4. One thing I noticed with this one was when going down a hill with a steep grade letting it hold back in 1st gear, the throttle surged a little up and down with my thumb off of it. Is this normal on the new fuel injections? Anyone else seen this before?