Sounds like a detented encoder like in the Siglent SDS2000 is needed.
@tautech - I'm not sure what you're referring to. Unless Siglent has changed their production of the SDS series since my recent review, the universal (multifunction) knob is NON-indented, and suffers from the same problem as the Rigol. In fact, it might be a little worse on the Siglent because of the wobble in the encoder shaft, which is lacking on the Rigol.
It is not really needed: you simply need to code a dead-zone in the software to ignore movement below a certain speed or require a minimum amount of movement after the last stop before accepting movement again.
This introduces a stutter or lag in the movement when moving slowly, slowing down, speeding up, etc. - perhaps better, but also not an ideal solution.
The ancient Tektronix 2232 has a momentary push rotary control and uses variable programmed hysteresis in the rotation which is both very simple and very effective. If I try, I cannot even make it glitch.
Well, we'll just have to accept your claim that the Tek knob is impossible to glitch, with smooth movement over all speeds it can possibly be turned at. Nevertheless, from a UI point of view, having to push something which rotates (except for the simplest toggling - e.g. coarse/fine) is a stupid idea on many levels and should be dropped completely from design.