Does the tool display properly on the 1080p screen?
This type of bug is typically super hard to fix when it can’t be reproduced.
Question: Does the tool appear first correctly on one of your screen, and then you move it to another screen that has a different DPI setup?
It’s possible that my code is failing on something related to querying size information on the wrong monitor when doing moving and resizing. (I’m using a combination of WM_GETMINMAXINFO and WM_SIZE, but maybe I should also track WM_DPICHANGED…)