It is, however contributing to road safety.
Because it is not just sitting waiting, the driver is on the phone. They have pulled over to make or take a call. And as studies have shown that even hands-free phone calls are dangerous, it is far safer for everyone to have the car pull over than drive round.
It comes down to priorities. Which would cyclists prefer
1. Cars blocking bike path exits on downhills
2. Cars moving around with the drivers on the phone rather than paying attention
The choice is obvious. Stationary hazards are manageable; they can be dealt with. Drivers on phones are a death threat. We should celebrate this driver for the choice they have made.