Hello @Kawaii_Shempaii,
Thanks for reaching out and I'm sorry to hear that you are experiencing this issue.
Can you please confirm if you performed all of the troubleshooting steps already provided in this thread, by any chance? If s, can you please provide us with a few screenshots of this occurring showing your current monitor setup and in-game selection, so we can have a look?
Many thanks and if you have any additional questions, please let us know.