LXD: learning container mac on wrong port of bridge

Hi,
i have a big problem with my installation using LXD.

whenever i set up a new container the system wants to get an ip adress via dhcp. it submits the request on the bridged interface, response arrives to the bridge and then... error.

reason:
albeit being on port 2 of the linux bridge, the brctl showmacs tells me, the mac adress of the container is on port 1. this makes lil sense, because the mac used for the dhcp request is the "faked" one (set in config). So the response will never arrive at the container, because the bridge filters it.

I already found 2 solutions on the net, one with a NAT (no option), one with buggy intel drivers - both dont apply for me. I'll have to use brctl - so are there any solutions or tips?

edits: it gets semi fixed when i ping the server from outside every 300 secs.