How to avoid missing of an audio's beginning?

Question

Hi,

Our Wwise-Unreal4 project is using Event-based packaging. We have been encountering a problem, that the dialogues sometimes lose the first one or two syllables. The dialogues are stored as normal Sound-SFXs in Wwise. Most of them are as short as 3 to 10 secs, with no streaming or other special settings. They are called by play-events in custom blueprints or scripts. I haven't notice any problem in notifications or direct assignments in animations, montages. ambient actors, components or etc. Not sure if those sounds are less noticable because they are usually not voice-over.

Is there a way to fix this?

Thanks in advance