Mute Snapchat's shutter sound

I have Snapchat 10.23.11 on Huawei and my friend has the same version but on a Samsung device. I have muted the system Camera app and in the system app, there's no shutter sound. In Snapchat, when I'm taking a photo using the back camera without a flashlight, there's a shutter sound but my friend on her Samsung device with the same Snapchat version doesn't have a shutter sound. When I had a Snapchat version from about October 2017, there wasn't a shutter sound. Last few days, I've updated the Snapchat app and all others app and the shutter sound appeared. What's going on? How to remove the shutter sound?