I get no cursor in GUI's, except for my own inventory. When opening chests or trading inventories, there is no cursor. Pause screen seemingly randomly has a cursor or no cursor, but that had been the case before 1.14.

This happens both in fullscreen and windowed. This only occurs when using a Wayland desktop, X11 seems unaffected (except for the invisible cursor in the pause screen, which happens in X11 as well)