In the Chernobyl TV series, they think they see a high but (short term) tolerable amount of radiation. It was actually just the upper limit of the measurement hardware and the real value was much higher.

And they're told it's the upper limit of the detectors, but choose to ignore that and take 3.6 as the gospel truth actual value.

It's a mockery of Soviet politics and party loyalty, but many of the errors apply to all bureaucracies.

Like my continuous glucose monitor.