Question about voltage limiter

A fault somewhere in the main charging system would do the same. You might not notice slightly brighter headlights, slightly faster wipers, etc... Not to say that the problem isn't localized to that instrument voltage limiter. I had a similar case. The gauges would read high intermittent and brief ( 20 minutes or so then back to normal ). The limiters ground connection was the root cause.
At one time oriellys had a replacement limiter for 18 and change. The mechanical limiter is old school electronics but they did work very well for a lot of years.
There are several modern solid state regulators out there with a variety of prices. Those with LEDs to show faults, etc.., do get pricey. I don't know how one is supposed to see those LEDs.