Today, I have tested the COM1 and COM2 frequency tuning using a Python script via SimConnect. While it worked for inibuilds A320 or A330 flawlessly, for the A350 around 50% of the frequency changes failed. I used the Events "COM_STBY_RADIO_SET" and "COM_RADIO_FRACT_INC_CARRY" in order to set the radio frequency. There is no error message or similar, it just fails.