I'm using a 1Gb symmetrical fiber connection. When I try uploading to my Wasabi account, transfers are only going at around 500 KBps and I'm unsure as to why that might be. Just for the hell of it I tried uploading with CyberDuck and transfers were at normal speeds. Transfers used to be faster with WinSCP, but I have no idea what may have changed.
I'm using WinSCP 5.15.1 with Windows 10 1809, build 17763.437. I have attached what is hopefully the relevant part of the log file.