I dont really know the proper place to make a bug report so I am making one right here, anyways when using RP Soundboard on TS and talkin at the same time once the sound is over your mic is still active event without pressing your push to talk key.
How to do it:
Hold down your push to talk key
Play a sound on RP Soundboard
Stop holding your push to talk key while the sound is playing
Once the Sound is over your blue circle will light up and people will be able to hear you