What exactly do you mean with " the cursor only worked fine if the cursor wasnt captured"?
Have you tried clicking on the game screen? At least for me, when I click in game, my cursor disappears and I can use the camera as intended :) maybe that helps
It's sorte of the opposite for me. When I left-click on the game window in the browser, the mouse disappears but I can't use the camera correctly: the sensitivity is HUGE (a pixel almost does a full turn) and I can't move the camera vertically. I might try again on my other PC, because the one I tried the game on has some issues with 3D games