I've checked Launchbox emulator-settings and Retroarch, both are set for h to reset the game. However it only works when I put h on the keyboard. Nothing happens when I try and do it from the pause menu. The other commands like load/save or exit, all work fine. Any help would be appreciated.
Here is the script from Lauchbox. I also tried changing it to k and had same results. I've gotten it to work in Duckstation.
; RetroArch resets game with H key by default
Send {h down}
Sleep 50
Send {h up}