Panasonic Leica 25mm 1.4 + GX7: Odd Quirk in Silent Mode

Описание: Just want to share with you a minor quirk I noticed with this combination when shooting in silent mode. I haven't tested other lenses yet but on my 20mm 1.7 lumix kit lens, the GX7 is absolutely silent but with the 25mm 1.4 - any aperture higher then 1.4 makes a a very audible sound every time I release the shutter.

Can any GX7 folks out there who have the same combo weigh in? Is this normal?