Silencer not silenced after unvanishing

When flying around vanished with a silenced weapon for admin purposes and then unvanishing, the silencer loses it's ability to silence the weapon. I can still see the silencer on the weapon but other players/admins cannot see the silencer on the weapon and hear the full gunshot.. We have tried flying around not vanished and the silencer was working fine all the time. We believe that vanish is the culprit...can you please have a look at this for me.

I have not tried this with any other weapon attachments.

Thanks

Edit: All attachments on the weapon act the same way. They do not appear for other players and have no function.

To remediate to this, we have to take them off and put them on again.

I almost banned a guy because I thought he was ESPing because he always knew where I was.
I tried reproducing this with an AK. I went into vanish with a silenced ak equiped and then unvanished. My ak was still silenced for me and other players. Is there any chance you can try and record you issue ?
@Whispers88 you need to fly around for a bit and have your buddy come to you 
you will always see and hear that the gun is supressed but it's not. I will try to send you a video here shortly.