Each time a table value is changed, the 3D view is recalculated. Depending on the component size, this may take a moment.
If you want to change several values, you can work more quickly if you temporarily deactivate the recalculation using Automatic recalculation on/off [Automatic recalc on/off].
You will find the button both in the View menu [View] and in the standard toolbar.
Furthermore you can find a respective button in the vertical table view.