For me it always starts on the top left of the screen. I tested Deep nights new game Nuclear Blaze and it starts on the top left for me as well.
I’m using Windows 10 Home x64
NVidia GeForce RTX 2080 TI
PRISM+ PG400U PRO (Screen Size: 40", Resolution: 3440 x 1440, Refresh Rate: 144Hz)
The only thing that is maybe out of the ordinary are the number of monitors I have. It’s quite large and it’s not one of the common brands. I also have an uncommon 3 monitor setup.
The red rectangle is where my window appears. The blue monitor is my main monitor. The 4th monitor exists but it is turned off.
I asked on the discord as well and I got no response there -.-