Puli, IPv6 with QCM

I just upgraded my Puli (with EP06-E) to firmware 3.201 and I am trying to enable IPv6 on my WWAN interface and I noticed that when I am using qcm as a protocol I can’t get a IPv6 address on the interface:


When I switched to protocol auto (3g) I am immediately able to obtain public IPv6 address from ISP, but issue is that with auto protocol my connection speed is less then half of the speed I can achieve compared to qcm. Is there anything else needed to configure in order to get IPv6 working with qcm protocol, please?