I've read about bumpy downshift(s) at deceleration.
In my opinion this thread describes the symptoms:
I am having issues with low-speed driving (5-40mph). When driving these speeds I commonly "big toe" the accelerator just to maintain speed. Now when I do this, approximately 1-2 seconds after I let off the accelerator, it feels like the vehicle tries to downshift into a lower gear, then goes back to the current gear. It feels like someone taps the brake. Alternatively, sometimes when I am coming to a complete stop it feels like someone taps the accelerator.

Three things happen when the issue above occurs: 1) the RPMs dip about 500-1000RPM and the car exhibits the above issue, 2) the RPMs DON'T dip at all and the car exhibits the above issue, and 3) the RPMs dip and I don't feel the vehicle "downshift."

Source:
Low speed issue after replacing Throttle Body [Archive] - Honda Element Owners Club Forum

The author of the thread took the vehicle for TPS calibration which fixed issue! Therefore those who having same symptom's may want to do the same