--no-mavproxy not respected in sim_vehicle.py?

Seems running the command sim_vehicle.py --no-mavproxy still results in mavproxy being run automatically.

The docs say with the --no-mavproxy option, and alternative GCS can be used:

" Using a different GCS instead of MAVProxy

Start sim_vehicle without starting MAVProxy using the --no-mavproxy option. SITL will be listening for any GGS station to connect via TCP port 5760."

from
https://ardupilot.org/dev/docs/using-sitl-for-ardupilot-testing.html#using-sitl-for-ardupilot-testing-connecting-otheradditional-ground-stations

Hello,
Can you show the output you got showing the issue and on what system you have the issue please?

Recently used this feature with no issue.