Ive got the same problem. However it seems to be a new problem, to me it happend after a windows 10 update.
This problem is very different to the classic problem where the cursor of the mouse disappears. In this case the cursor gets invisible once you're above any icon you can click at.
I'll explain it like this: You join the game and you can view the moving of your cursor... but once you move the cursor to any icon like "play", "pratice", "roomname", "playername" etc it will disappear as long as your cursor is next to any of theses icons. Once you move it to a "neutral positioin" the cursor will appear again
Its not a game breaking thing but it's really annoying.