Beeping noise whenever mouse is not inside TS window.

[unable to retrieve full-text content]

Hello. I have suddenly started getting a beeping noise whenever I press my push-to-talk button, however it ONLY plays if my mouse cursor is not currently within the Teamspeak Client window. I did NOT change any settings since I last used it and it has only just started happening now. I have... Beeping noise whenever mouse is not inside TS window.