Playing on a secondary display with a higher resolution than primary display.

[Faey]

I have two displays, a 1920x1080 monitor (primary display) and a 3840x2160 TV. I can set the game to launch on the secondary display through the launcher (gives proper resolution options in launcher), but the resolution for it (once it launches) caps at that of my primary display. Without changing which is the primary display, is there any way of getting it to play at the proper resolution? (changing which is primary does allow proper resolution, but I'm looking for an option that doesn't require changing it).

 

[AndrewT]

I rather suspect this is not a tested scenario.

What if you launch it in windowed mode then drag it from the primary to the secondary, is that any better?