Sometimes, when previewing a mission in the editor, the first grenade explosion sound is incorrect (I believethe sound pitch is increased).
- Legacy ID
Sadly, very random. But try:
spwan a rifleman > preview > throw a grenade and listen to the explosion sound.
I made a thread similar to this issue that was closed, this was the "duplicate of" issue referenced.
However the sound happens every time and all the time with hand thrown grenades whether in the editor or anywhere else, but does not affect launcher grenades.