if you set a FloatProp slider to operators and shows in Redo Panel,
it works fine if the executions are not intensitive.
but with heavy actions loading involved in some float/int prop slider,
blender becomes lagging or even frozen while tweaking the slider.
it is better to have an argument for slider prop invoke only when the parameter got confirmed.
Yes, although you can click>type>enter to avoid this issue(as developers),
some users don’t know what is loading behind the scene, lead them to get trapped so easily.