Same thing happened to me. Spent hours to find out what is really happening, so from my own research, somehow the A350 is conflicted by another addon/program that related to MSFS. It's strange but i found a way how to fix it, i usually run vpilot, LRM (Landing Rate Monitor) and REX Atmos right after i launched MSFS, then this thing happened. Then i tried to launch the MSFS without launching all those apps, everything works fine. Maybe you can try this out but I'm sure you have a different situation on your computer.
