Send some logs to @eransharv on slack.
Here is what happened:
HS is in windowed mode.
Did not play an actual game yet.
I think I did check the Overwolf dock during this step to open my app.
But eventually opened my Dev App from desktop shortcut.
My mouse cursor is gone when hovering over the game window (including the title bar).
The above could have already been the case before I started my app, not too sure.
When hovering over an in-game overwolf app window, I can see my cursor.
When hovering over the game itself I cannot see any cursor, but I can still interact with the game.
Hovering my pointer over the titlebar of the windowed Hearthstone, also hides the cursor.
Left-click dragging the titlebar will actually show a mouse cursor, but it will be gone once i stop dragging.
Changing resolutions or going to fullscreen mode doesn’t not fix the issue.
Restarting Hearthstone fixed it.
When it comes to Overwolf or my test App’s state, I am really not sure the order or state my app was in and if this caused the effect. I was casually opening Hearthstone and might have not noticed that my test app was already running in the bg.