pc版の Easy Anti-Cheatが悪さをしてるってことでいいのかなぁ
http://www.windowscentral.com/how-disable-anti-cheat-elden-ring


1 Go to the Steam library location where you installed Elden Ring.
2 Go to steamapps > ELDEN RING > game.
3 Rename start_protected_game.exe to something else. (I added "_original" to the end of the file name.)
4 Make a copy of elden_ring.exe.
5 Rename this newly made copy to start_protected_game.exe.
6 Run the game through Steam as normal.