Rhythm heaven megamix button holding issues

i’m new here so sorry if i do something wrong! ^^;
i’ve been playing rhythm heaven megamix with citra the past few days, and there’s a problem. sometimes when i hold a button, which is required as an input for some rhythm games, the button will let go before i actually let go of the key. as in i’ll still be holding down the key on my keyboard but the game will think i let go of it when i actually didn’t, which makes some games near impossible to even just pass without using the touch screen mode.
i just wanted to make this problem known so it can hopefully be fixed at some point in the future! sorry if i did anything wrong when making this! (i may’ve used the wrong category; i’ll try to correct that if i did)