Both of the Citation Jets (C25C & C700) do not send the proper COM1/COM2 radio status to the vPilot client for VATSIM, so we cannot speak with any controllers over the network when flying those to planes.
I run no other plugins than that, so it’s either vPilot, or MSFS 2020. As this showed up after the latest European World Update, I am led to believe it is MSFS 2020.