Look at this config:
CfgWeapons → missiles_SAAMI → StandardSound → soundSetShot[] → Static_Launcher_Titan_ATAA_Vehicle_Shot_SoundSet doesn't exist in game config
Due this on shoot only echo will be played, which is added with correct class name
Apparently was planned to create a same class to "Static_Launcher_Titan_ATAA_Shot_SoundSet", but something went wrong and now there are no shot sounds except the echo (tails)