I have a linksys wrt32x router that I have flashed with the latest venom firmware.
It behaves very peculiar on the ac 5GHz bands. The network name becomes invisible and it drops all connections save one. After a reboot the name becomes visible again for a very short period of time.
Running what?
Mine runs fine in general, I do see occational reconnects like once every third day or so on my WDS link (ath10k, Linksys EA6350v3) but other than that it works fine.
Both are running r10512 with some mild performance patching but that shouldn't affect wifi stability.