[opensuse-factory] empathy video call closes immediately

Hello opensuse-factory, thanks for your great work! I'm runnning opensuse Tumbleweed and I've experienced a problem with empathy. When I start a video call the chat windows appears and disappears after producing once the ringing sound. Empathy gives no shell output when this happens. The empathy-debugger output for gabble is attached to this email. This happens every time I try to call regardless of my contacts client and provider, so the problem seems to be on my side. Is this a bug or some stupid mistake of mine? Best regards, Christian Weinz