Jitsi Chrome iOS - Viewer only

Hi

I am using lib-jitsi-meet and my own Jitsi Meet server to have a single publisher with lots of viewers, it is working well. I only have a problem with Chrome iOS being a viewer, I get this error in the logs:
[modules/xmpp/JingleSessionPC.js] Error renegotiating after setting new remote offer: InvalidAccessError: Failed to set remote offer sdp: Media section has more than one track specified with a=ssrc lines which is not supported with Unified Plan.

I have looked into JingleSessionPC.js to try and create the remote offer differently, but have not had any luck. Can anyone provide some advice?