Hello again Olivier,
The way you implement this type of sound is not similar to the way you would implement the others pertaining to the sound radius. Since it is louder the further you get from the sound, keep the “Radius” to a ‘tight’ low value, and increase the fall-off to the area you would like it to attenuate. That way you will not hear the popping from the “Radius” itself when getting closer.
If you are trying to use sound for a weapon, I like to use the “Natural Sound” or “Linear.”
As mentioned previously, the LogReverse is working as intended, just the way you implement it is a bit different than other sounds.
I hope this helps,