This issue should be fixed now if you download the latest build! Sorry, I never thought to test resolutions above 1080p! Even though I myself am on 1440p monitor!!! Let me know if you continue to have issues.
Confirmed, it is fixed, thank you!! Finisced and mastered :P!
I had some issues with the port's merchant menu as well. I was plying on a 1366x768 screen size...