Hi, thanks for the fast response. The sound issue does not occur anywhere else. Only the effect when switching gear sets. All other audio appears fine both effects and background music. I can't imagine its due to lag/latency, I typically don't have an issue with that; and it happens completely and utterly at random. Not sure it ever happened when I was in a fully quiet place, so am still wondering if its intended behavior and the sound gets cut/faded for other sounds, I have no idea! :-)

Edit: I can probably post a Youtube video of it if you'd like. Next time it happens I'll try and capture.