I have had this happen a handful of times. If I go into my map then back to the game the cursor is gone. Not something you want to have to do, but its a quick fix for now.
The easiest solution I have found for this, is that when the mouse cursor appears hit esc then move the mouse cursor to the bottom of the screen where it is no longer visible and esc out. It seems the game will try to attach the mouse cursor to the crosshair when switching from menus that use the mouse. I believe it has to do with a coding timing error where the mouse cursor should despawn before the crosshair spawns but in some cases it does not.
Also i got zero problems with mouse in Dragon Age Inquisition (another Frostbite engine game by Bioware), but in Anthem and Andromeda.
Thar's not entirely the same, because the cursor is supposed to be visible all the time in Dragon Age Inquisition.
It's happening to me as well, sometimes. Although I didn't tested that thoroughly, it seems that the problem appear more often when you open and then close the Journal (or similar page) in a quick succession. It can also happen when quick closing a News page upon entering the game. Running borderless window.
February 2019 - last edited February 2019
I would love to use that .dll fix (it worked for me on Andromeda).
I would like a support representative to respond and say whether we'll be banned or not for putting that in our installation folder before I do though.