Hi Anton,
You might need to start fop2_server with debug level 15 (./fop2_server -X 15) and watch at the output while you see those rogue buttons appear, and see what manager event is triggering that change. If you can capture that and sent it to me I will be able to look at it, and if its a fop2 bug fix it. But it might also be some kind of registration event coming to asterisk?
Best regards,
