When interacting with the main UI (worlds, avatars, social, etc), the cursor gets stuck on the UI when you drag outside of the UI panel. This issue resolves when you click back on the UI panel, but this can still be very annoying to deal with when using desktop mode. You also need to drag your mouse a small distance before you start dragging the UI elements. These issues have been in the game since 2017 and I have never gotten completely used to it.