DrWig, he may have tuned radio 5 to you privately. If he did you wouldn't see his name in the message window, brough up by the / key, or in the Voice box, the box showing tuned and range channel and the people on them.
When I loose Xmit capability I usually recieve AOK. I sometimes get graphic glitches. IIRC, the square tic tac toe box around the deploy letters goes away and when I hit t or F12 to Xmit I believe I see a change in my Voice box area. 9 of 10 times when I exit to relog I get the 'Try alternate route' and the 'lines' on that display are corrupted similar to the tic-tac-toe deploy thing. Most times this requires a computer boot to clear and reconnect.