Hi, the symptoms I have are rubberbanding, and the LAG ui appearing almost constantly.
I'm on Windows 10,
ISP is Optus,
Gigabit ethernet all the way to the modem (actual internet is wireless broadband but no other game ever lags),
Speedtest is showing 15 Mbps down and 14 Mbps up and 40ms ping although I have occasionally see it go as high as 40 Mbps down in off peak times,
It doesn't seem to be related to time of day (although I've only tried to play twice), it seemed to be worse when I added more dummies to my lobby,
It's lagged every time I've played, enough to be unplayable,
It always shows AUS and the speedo icon never goes above about 80 (usually sits at 40). Even when I'm in game and actively rubberbanding it doesn't go above 80, although the slow update times on the reading could mean it's spiking really quickly then coming back down.