SetAudioOnly(true) still shows the icon to turn video back on

Hi all - I am trying to set up voice only conferences (i.e. no video allowed) but the toggle video button is still displayed. I’ve tried both setAudioOnly and setVideoMuted but the users can just one-click undo these.

Here is the relevant part of my code:

    val options = JitsiMeetConferenceOptions.Builder()
        .setServerURL( URL("https://meet.jit.si"))
        .setWelcomePageEnabled(false)
        .setAudioOnly(true)

Thank you!