I tried removing and reinstalling my client. But no change. It still slams upon sign in on that account. It’s odd because I don’t even see a specific setting for sounds upon sign in. There are options for sounds on sending or receiving messages and many other events. But none specifically asking if you want a sound on sign in.

Even so, I have every sound I can possibly set on “No Sounds” and my other screenname, with the exact same settings, has no sound on sign in.

Any other ideas please? This is a real mystery!