Enter and Arrow Keys not working in Plasma DE, work fine in Hyprland

I’m running Arch Linux using Plasma for the majority of tasks and primarily using Hyprland for dev work. I have an MSI Katana 17 v2 laptop with a numpad and media controls on the function keys. I have run into an issue where the enter key will either not work at all, or paste a seemingly-random character (often, but not always, a letter like “z” or “q” which I know has not even been recently typed), and the arrow keys are entirely nonfunctional. This happens independent of the currently used software. I have has this issue using ANY linux-native application in a plasma session. The issue disappears when I switch to Hyprland. I prefer Plasma for most tasks and am really hoping someone has run into a similar issue and can help find a fix.