Ring Camera 50% working

Hi, I successfully added 2 Ring Cameras to HA and Homekit… all working fine myself and 1 other can view the camera and streams…

I have since added a Ring Stick Cam… the cam shows up on BOTH Homekit Apps, I can view the camera and the live feed but the other can only view a black screen (even if I am out of the app)…

Does anyone know why this is happening? and only to this cam?

They have sharing on the Ring App and can view all 3 cams in Ring but only 2 are viewable in their HomeKit.

Have done the usual, restart, uninstall, reinstall etc but it is always this “new” camera