Yep - but not exactly the same. I will say I believe it may be due to extended runtime on garrysmod. I believe it's only occurred when I've left it running overnight.
Without me speaking/queuing my mic, my mic battery is draining. I have to reconnect to the server to stop this. It will start again. It queues my mic when someone else speaks. It's not capturing my voice when other people are speaking and my name pops up in the top left.