Audio of "normal" call routed to other participants


When I am attending a Jitsi session with multiple participants and I get a “normal” call. The audio of the normal call seems to be routed to the Jitsi app to all participants without any notification, any idea how to change this setting? Disabling native call integration does not seem to resolve this.

We are using a custom rebuild of the android sdk
Sony xz1, F8342
Android V9


I can reproduce this as well! This seems to be a serious security issue; people can hear your ‘normal’ conversation in the Jitsi conversation, both you and the person on the other line, without you noticing!
Somebody knows what is wrong?