Do I have to stop pedaling when shifting up the front chainring? If I keep pedaling when shifting up the front chainring, it would fail. Moreover, the chain keeps rubbing with the chainrings and produces many noises. Thus, I have to stop pedaling for around one second when shifting up.

My bike comes with a 'Shimano Sora, band-type 34.9mm' front derailleur. The chainrings are 50/34T.

I am new to road bike and don't know whether it is normal. I am not sure does it indicate wearing or misconfiguration. If it is normal, is the practice of stop pedaling the best technique when shifting up?
Use the Clutch!

This is what I always tell people when I'm teaching them how to shift gears properly. Chain-rings and Cogs are machined with *pickup points" that assist transferring the chain from one ring to the other, they only work while you're turning the cranks. So I tell people to let all the power off of their pedals, but keep the cranks turning and don't step back into the pedals with any force until the chain has fully shifted.