With todays steam release, this issue is still present.
I also have a three monitor setup in use. One 4k monitor as primary display and two 1080p monitors as secondary and tertiary display.
When I start the game, the 2k and gearbox logos, also the dancing claptrap is shown on my primary display in the correct 4k resolution.
After the intro logos, when the game engine starts, the game switches to one of the 1080p displays.
In the game options i can only switch between the two 1080p display and i can see their correct model numbers. But the 4k Display is not recognized or shown.
Even if i try to force the preferred display setting in the config file, the game switches to one of the 1080p displays and didn’t recognise the 4k display.
For testing purpose, i’ve deactivated both 1080p displays, so that only my 4k display is active. When i start the game now, the “target display” is shown as unknown. And although it’s showing an autodetected 4k resolution, it’s only a 2k resolution according to my osd from my monitor. If i switch the resolution back to a lower resolution and then back to 4k, it finally switches to the real 4k resolution visually and proven to through the monitors osd.
Having to deactive additional displays in order to be able to play the game is not an acceptable option. I need to be able to use the other displays while ingame.
I have updated to the latest gpu and display drivers, but it’s not an issue with drivers. I don’t have this issue in any other games, not even in Borderlands 1, 2 oder Pre-Sequel. It’s just an issue with Borderlands 3. And it’s very disappointing, that this issue haven’t been fixed, after such a long time since the game have been released.