Hmmm the point where it freezes the cursor isn't in view, which suggests to me that it's not a key repeat issue. If it was we would see the cursor just sitting still while the view caught up with it. Instead we see the view, still trying to catch up with the cursor, just stop, which suggests some sort of problem with frame rate or something. I also notice that when it resolves itself, it skips all the way to the end, not smoothly resuming the animation, which suggests that the application continued to run, and the new frames just never went to the screen for some reason.
All I can think is that it might be an issue with graphics drivers/card and linux version, or the window manager. Could you send any and all information of that type you can? If you would prefer to keep it private you could send it to
[email protected].