Obviously, it's a waste of time with you, since I asked a few times already, but will try one more time: can you demonstrate an example of specific research regarding the effects of phone use while the vehicle is stationary?
There is ample research on the risks of using a phone while driving. I'll leave that as homework for you.
As to the question of whether the car is transitioning or about to transition from stationary to moving or not, the driver is in control throughout: it is all "driving". You may as well ask whether there is any specific research on the risks of mobile phone use while driving in Hertfordshire, or when driving on a Tuesday, or when driving while wearing yellow socks.
While you are in control of the car you are driving. It is your responsibility to devote your full attention to the task at hand. Some drivers like to think that they are special exceptions and that this doesn't apply to them. I'm a skilled driver they may say - a couple of pints won't affect me. Or, I was momentarily stationary at the time during the red phase of the lights or waiting at a junction or roundabout, they may say, a quick peek at my phone can't do any harm, surely. Or, I was cruising in clear conditions in light traffic on the motorway, surely I can look away for a bit.
Wrong.