In my lab the equipment is a Cisco IOS Software, 2800 Software with Version 12.4(24)T
In the large lab (same equipment as field), the issue is seen on a 7206 VXR also with 12.4.
In both cases, if the bridge group is removed and q-in-q terminates at the layer 3 interface (the GigE), it works fine. When the bridge group is added and the layer 3 is provided by the BVI, the problem occurs.
Thanks for your help.