Resolution capped at 720x576

I can’t set the resolution to more than 720x576 and if I try to set it any higher, it goes even lower.
This problem started happening after I got a second monitor that has a lower resolution than my main one. If I unplug the second monitor from my pc The problem goes away, but having to unplug my second monitor every time I want to play unturned is really annoying.

My best guess would just be that your monitors are incompatible with each other, I honest have no clue though

Edit: I found this website that might actually help you out, have a read if you want to try anything out c:

You can’t set it to a res higher then your native monitors res… So your monitor is 720x576

My resolutions are in my main monitor 1920 x 1080 and on my second one 1280 x 720, so I don’t think it’s that.

Don’t think that there’s anything useful for me there. Thanks anyway!