As with the previous comment, the internal keyboard of the laptop works correctly with the delay/speed settings I've set. However my primary keyboard, a USB keyboard, loses the delay/speed settings once the laptop restarts or resumes from sleep/hibernation.
I can confirm that toggling repeat keys off and on again fixes the issue temporarily for the current session.
I am also experiencing this bug on 20.04.1 LTS.
As with the previous comment, the internal keyboard of the laptop works correctly with the delay/speed settings I've set. However my primary keyboard, a USB keyboard, loses the delay/speed settings once the laptop restarts or resumes from sleep/hibernation.
I can confirm that toggling repeat keys off and on again fixes the issue temporarily for the current session.