I have a new macbook pro (2020) with a caldigit dock which has a TB connection to an Asus 34" ultrawide screen.

I could not get DOS2 to work at all, and tried a number of fixes. However, once I disconnected the game and ran it only on the laptop, it worked.

Is there anyway I can get the game to work with the extended monitor? I have trawled google and the forum posts but can't find much on this, other than a couple of threads that suggest DOS2 is not good with external monitors.

Grateful for any advice,