Heisenbug

In computer programming jargon, a heisenbug is a software bug that seems to disappear or alter its behavior when one attempts to study it.

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Similar terms, such as bohrbug, mandelbug, hindenbug, and schrödinbug, even more higgs-bugson

https://en.wikipedia.org/wiki/Heisenbug

I'm a coder with Physics background, and these jargons are surprisingly funny and precise, LOL.