I have noticed an issue with the mouse pointer not updating, this happens only when the server is configured for X11 graphics mode. It also only occurs the first time the client app (Windows or MacOS) connects to server and opens a new virtual desktop.
1. If the player is then closed without closing the Ubuntu session and subsequently the same session is reopened the issue disappears.
2. If the player is closed by logging out of Ubuntu and closing the current session, on creation of a subsequent new virtual desktop session the issue reappears.
This issue did not seem to affect the last version of the server/player.
I have attached a couple of snapshots. You can see the resize not updating when the pointer leaves the window area.
One further point is that I tried to record the screen using the NoMachine screen recorder (and a recording was generated), but when I tried to play it back in NoMachine it declared the file corrupt (I tried this twice using the Windows player).