This is a vey confusing error that happens to me, when i'm on a server for more than about five minutes now, my mouse suddenly doesn't work, I know it isn't the mouse because it only happens when I play Blockland. Then when I use Alt+F4 to close Blockland it still doesn't work so I need to shutdown my computer through the power strip which isn't good for the computer. Has this happened to anyone before?
Update: The last time this happened my Blockland did something strange and it reset all my preferences such as clan tags, Avatar, and text size. I have not downloaded any mods recently so I don't have any leads as to what could be causing the problem.