I have been testing this for 2 days now and have found this to be a persistent problem for me can anyone else confirm ?
I am connected to gigabit lan, When WIFI is turned on and I am also connected to WIFI I get approx 1/2 my usual SMB transfer speed
Just turning off WIFI does not correct the problem for me, I have to Long press forget network and reboot and the speed is back to normal
Seems to me when connected to both LAN & WIFI something is not happy.
Almost forgot, Merry Xmas to everyone, I hope Santa is good to you all, I will probably get a bag of DogShit