Okay, so I was mid-strike and suddenly my mouse's tracking started lagging and jumping to an unplayable level. After multiple in-game restarts, unplugging and replugging my mouse, checking mouse software for updates and restarting it, and finally 2 full system restarts, nothing has fixed it. In-game in Destiny 2, no matter what the context, my mouse's cursor tracking is horribly laggy and jumpy. I've tried multiple other games and other separate computer programs and have no issues, it's only when in-game. Has anyone ever heard of this?