Issues related to 144hz monitor (maybe?)

[andrewzah]

Your system information

• System information from steam: https://gist.github.com/azah/1b74f40411d8fae20523ad023f9f0a82
• Have you checked for system updates?: Yes
• Are you using the latest stable video driver available for your system? Yes
• Have you verified the game files?: No

Other System Information

• Debian 9 Stretch
• No desktop environment, just i3 for window management

Please describe your issue in as much detail as possible:

I should be able to click play and have the game load correctly. On my main 144hz monitor the game gets stuck at the 'Valve' screen unless I add -phased_window_create. See below image. The game loads correctly on my second, 60hz monitor without this flag.

It also causes occasional UI lag, particularly when new windows are created or removed.

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I was able to get the game to run on the 144hz monitor with -phased_window_create and -sdl_index 1(?) I forget the exact flag and google is being unhelpful. -opengl and -vulkan didn't appear to affect it. However:
I should be able to mouse out of the game to my next monitor without issues, but the game suddenly changes to a small portion within the monitor. See below image:

Steps for reproducing this issue:

1. launch underlords on debian from steam on a 144hz monitor with no launch flags (note the steam window is on the 144hz monitor)

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1. launch underlords on debian from steam with the following flags: -phased_window_create and -sdl_index 1(?). I can't find the exact flag for the latter anymore.. (note the steam window is on the second monitor now)
2. during/after game is loaded, move mouse to second monitor