No. I still have the drain unfortunately.
But I'm pretty confident it is connected with my home wifi because I see NETLINK wakelock taking most of the time + without wifi or flight mode phone is sleeping like a baby. The funny thing is that at work everything is fine with wifi.
I guess something is messed up with my Virgin Superhub router (which is Netgear technically). I'm trying all sorts of stuff currently - changing channels, frequencies, assigning static IPs etc - still no luck.