That was not my experience when I used one for commuting back in the '70s. Mine was the standard miner's type with a parabolic mirror behind the flame and no front covering. It worked fine at all speeds but would blow out if I placed my hand out in front of the flame, presumably due to the resulting turbulence. The flame would sometimes be bent a bit to the side due to wind but I don't remember it ever being blown out due to wind alone.

Since the flame intensity was determined by the rate of water drip it had the interesting characteristic of automatically getting brighter when on rougher pavement. After hitting a few bumps the flame would sometimes extend at least 4" out the front. Used it for a couple years but eventually the carbide container developed a crack and the acetylene would leak out.