Maximizing steam on my far left monitor causes the window to either overlap with my primary monitor or causes a line to appear where it would have ended.
What is causing this and any ideas how to stop it?
This is a Steam bug unfortunately. It occurs when there is a taskbar on the non-primary monitor (regardless of whether it's a Windows taskbar, DisplayFusion taskbar, or some other third-party taskbar). There's a Steam Discussions topic here, and they are aware of the issue, so hopefully it will be fixed up at some point
