Did you try turning off the main power breaker at the battery, than disconnection the Touchpad? Reconnect it after a few seconds.
I’m not sure of the exact wiring of the Nav lights (Bow-Touchpad), but the bow switch and others being intermittent could point back at the Touchpad.
Also with the main battery/breaker switch in the on position, try turning on the main power switch. I know its not required for the locker lights to work, but if they stop blinking, it could be the circuit/timer that makes them blink after a locker has been opened for some time.
The LED bar your referencing, bilge? Trailer?