VLC and THX audio

Hello. I recently bought the Razer Nommo V2 pro speakers. When I want to watch a movie through VLC, choosing THX audio, when I move the slider bar to choose a specific scene, a scratching sound appears and the rgb lights blink for seconds. I haven’t updated to the newest Synapse version yet. This happens when I move the bar at a specific point in the film; pressing “play” and then immediately moving the slider bar to a specific point. Not when I watch the movie from the beginning. I’m referring to the speakers. Not the headset. Please help.