restartComponent when parameters units change

I wish to refresh my Parameter Display views when I change the Parameter’s units. I tried to run restartComponent but it does nothing in this case.
I tried as follow:

componentHandler->restartComponent(Steinberg::Vst::kParamTitlesChanged | Steinberg::Vst::kParamValuesChanged);

But no change.

Hi, if you talk about your parameter display views, is this something the host draws or something your editor is showing? I ask, because the restartComponent call can only change the stuff drawn by the host.