Amp meter is still working. For now, as long as it's working I'm not going to worry about it. Maybe will take a look behind the cluster this winter if I get the other project completed.Is your factory amp meter still functional?
Mine did the same thing until I decided to remove the amp meter from the equation. You could wiggle the big wires at the back of the meter and cause loss of power.
If this is the case and you want it to work you’ll need to remove the cluster and clean the connections