Passcode input lags and gets prompted every time I switched app

[Fu Sing 2]

Hi, whenever I open the app, the passcode input lags very badly between keystroke and actual registration of the password (It could be up to 3-5 seconds), making opening the app's experience very bad. Worse, whenever I switch to another app (as part of my note-taking process), when I switched back to the app, even if it was just few 2-3 seconds before switching back to the app, the passcode page comes up again and I experience the same passcode input lags. Hope this can be improved. Thanks.