Newbie looking for help TP-link archer c6 v3.2

Hey guys!
So I just installed openwrt to my router and is working flawlessly on wired connections and the MediaTek MT7603E 802.11b/g/n radio, but MediaTek MT7613BE 802.11ac/n doesnt work.

Any Idea what I've missed?

Setting the channel solved it.

MT7613BEN is a rather limited chipset, which does not support DFS - it works, but it's not really recommended due to a number of limitations.