can u do a video showing what it looks like with the fast random inputs? does it happen without you pressing anything?
if you're not busy, can you try running this and let me know if it still does the input spam? its the HTML version but for desktop~ https://moonspod.itch.io/input-display-test/download/6I_NRUK0vGNkISB1_iW7R2UEy6Q...
aah i really dont know why this is happening, it sucks, try one last thing, grasping at straws, there is another download for an fps locked version https://moonspod.itch.io/input-display-test/download/VhOznDZIN3XO8bceLF47pSxPATd...
if this doesnt work, which i doubt it will, i wont be able to help sadly, sorry